diff --git a/README.md b/README.md
index 70323b6..2723360 100644
--- a/README.md
+++ b/README.md
@@ -67,9 +67,18 @@ Slide transition duration in milliseconds [(example)](http://codepen.io/pawelgrz
 **`easing`** (string)  
 It is like a CSS `transition-timing-function` — describes acceleration curve [(example)](http://codepen.io/pawelgrzybek/pen/aWovrB).
 
+**`center`** (boolean)  
+Determine if slider will be center in the selector or not.  Default: false.
+
 **`perPage`** (number or object)  
 The number of slides to be shown. It accepts a number [(example)](http://codepen.io/pawelgrzybek/pen/bWbVXz) or an object [(example)](http://codepen.io/pawelgrzybek/pen/dWbGyZ) for complex responsive layouts.
 
+**`offset`** (number or object)  
+An offset applied on slides width based on items per page.  
+For example, a configuration with perPage = 1 and offset = 0.25 will show in viewport the current slide and 25% of the next slide.  
+With center attribute enable, it will show 25% of the prev slide, the current slide and 25% of the next slide.  
+It accepts a number between 0 and 1 and object with value by breakpoint as for **perPage** attribute.
+
 **`startIndex`** (number)  
 Index (zero-based) of the starting slide [(example)](http://codepen.io/pawelgrzybek/pen/vmBLER).
 
diff --git a/dist/siema.min.js b/dist/siema.min.js
index 48e29c7..aaf1b94 100644
--- a/dist/siema.min.js
+++ b/dist/siema.min.js
@@ -1 +1 @@
-!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define("Siema",[],t):"object"==typeof exports?exports.Siema=t():e.Siema=t()}("undefined"!=typeof self?self:this,function(){return function(e){function t(r){if(i[r])return i[r].exports;var n=i[r]={i:r,l:!1,exports:{}};return e[r].call(n.exports,n,n.exports,t),n.l=!0,n.exports}var i={};return t.m=e,t.c=i,t.d=function(e,i,r){t.o(e,i)||Object.defineProperty(e,i,{configurable:!1,enumerable:!0,get:r})},t.n=function(e){var i=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(i,"a",i),i},t.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},t.p="",t(t.s=0)}([function(e,t,i){"use strict";function r(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(t,"__esModule",{value:!0});var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e},s=function(){function e(e,t){for(var i=0;i<t.length;i++){var r=t[i];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}return function(t,i,r){return i&&e(t.prototype,i),r&&e(t,r),t}}(),l=function(){function e(t){var i=this;if(r(this,e),this.config=e.mergeSettings(t),this.selector="string"==typeof this.config.selector?document.querySelector(this.config.selector):this.config.selector,null===this.selector)throw new Error("Something wrong with your selector 😭");this.resolveSlidesNumber(),this.selectorWidth=this.selector.offsetWidth,this.innerElements=[].slice.call(this.selector.children),this.currentSlide=this.config.loop?this.config.startIndex%this.innerElements.length:Math.max(0,Math.min(this.config.startIndex,this.innerElements.length-this.perPage)),this.transformProperty=e.webkitOrNot(),["resizeHandler","touchstartHandler","touchendHandler","touchmoveHandler","mousedownHandler","mouseupHandler","mouseleaveHandler","mousemoveHandler","clickHandler"].forEach(function(e){i[e]=i[e].bind(i)}),this.init()}return s(e,[{key:"attachEvents",value:function(){window.addEventListener("resize",this.resizeHandler),this.config.draggable&&(this.pointerDown=!1,this.drag={startX:0,endX:0,startY:0,letItGo:null,preventClick:!1},this.selector.addEventListener("touchstart",this.touchstartHandler),this.selector.addEventListener("touchend",this.touchendHandler),this.selector.addEventListener("touchmove",this.touchmoveHandler),this.selector.addEventListener("mousedown",this.mousedownHandler),this.selector.addEventListener("mouseup",this.mouseupHandler),this.selector.addEventListener("mouseleave",this.mouseleaveHandler),this.selector.addEventListener("mousemove",this.mousemoveHandler),this.selector.addEventListener("click",this.clickHandler))}},{key:"detachEvents",value:function(){window.removeEventListener("resize",this.resizeHandler),this.selector.removeEventListener("touchstart",this.touchstartHandler),this.selector.removeEventListener("touchend",this.touchendHandler),this.selector.removeEventListener("touchmove",this.touchmoveHandler),this.selector.removeEventListener("mousedown",this.mousedownHandler),this.selector.removeEventListener("mouseup",this.mouseupHandler),this.selector.removeEventListener("mouseleave",this.mouseleaveHandler),this.selector.removeEventListener("mousemove",this.mousemoveHandler),this.selector.removeEventListener("click",this.clickHandler)}},{key:"init",value:function(){this.attachEvents(),this.selector.style.overflow="hidden",this.selector.style.direction=this.config.rtl?"rtl":"ltr",this.buildSliderFrame(),this.config.onInit.call(this)}},{key:"buildSliderFrame",value:function(){var e=this.selectorWidth/this.perPage,t=this.config.loop?this.innerElements.length+2*this.perPage:this.innerElements.length;this.sliderFrame=document.createElement("div"),this.sliderFrame.style.width=e*t+"px",this.enableTransition(),this.config.draggable&&(this.selector.style.cursor="-webkit-grab");var i=document.createDocumentFragment();if(this.config.loop)for(var r=this.innerElements.length-this.perPage;r<this.innerElements.length;r++){var n=this.buildSliderFrameItem(this.innerElements[r].cloneNode(!0));i.appendChild(n)}for(var s=0;s<this.innerElements.length;s++){var l=this.buildSliderFrameItem(this.innerElements[s]);i.appendChild(l)}if(this.config.loop)for(var o=0;o<this.perPage;o++){var a=this.buildSliderFrameItem(this.innerElements[o].cloneNode(!0));i.appendChild(a)}this.sliderFrame.appendChild(i),this.selector.innerHTML="",this.selector.appendChild(this.sliderFrame),this.slideToCurrent()}},{key:"buildSliderFrameItem",value:function(e){var t=document.createElement("div");return t.style.cssFloat=this.config.rtl?"right":"left",t.style.float=this.config.rtl?"right":"left",t.style.width=(this.config.loop?100/(this.innerElements.length+2*this.perPage):100/this.innerElements.length)+"%",t.appendChild(e),t}},{key:"resolveSlidesNumber",value:function(){if("number"==typeof this.config.perPage)this.perPage=this.config.perPage;else if("object"===n(this.config.perPage)){this.perPage=1;for(var e in this.config.perPage)window.innerWidth>=e&&(this.perPage=this.config.perPage[e])}}},{key:"prev",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:1,t=arguments[1];if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;if(this.config.loop){if(this.currentSlide-e<0){this.disableTransition();var r=this.currentSlide+this.innerElements.length,n=this.perPage,s=r+n,l=(this.config.rtl?1:-1)*s*(this.selectorWidth/this.perPage),o=this.config.draggable?this.drag.endX-this.drag.startX:0;this.sliderFrame.style[this.transformProperty]="translate3d("+(l+o)+"px, 0, 0)",this.currentSlide=r-e}else this.currentSlide=this.currentSlide-e}else this.currentSlide=Math.max(this.currentSlide-e,0);i!==this.currentSlide&&(this.slideToCurrent(this.config.loop),this.config.onChange.call(this),t&&t.call(this))}}},{key:"next",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:1,t=arguments[1];if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;if(this.config.loop){if(this.currentSlide+e>this.innerElements.length-this.perPage){this.disableTransition();var r=this.currentSlide-this.innerElements.length,n=this.perPage,s=r+n,l=(this.config.rtl?1:-1)*s*(this.selectorWidth/this.perPage),o=this.config.draggable?this.drag.endX-this.drag.startX:0;this.sliderFrame.style[this.transformProperty]="translate3d("+(l+o)+"px, 0, 0)",this.currentSlide=r+e}else this.currentSlide=this.currentSlide+e}else this.currentSlide=Math.min(this.currentSlide+e,this.innerElements.length-this.perPage);i!==this.currentSlide&&(this.slideToCurrent(this.config.loop),this.config.onChange.call(this),t&&t.call(this))}}},{key:"disableTransition",value:function(){this.sliderFrame.style.webkitTransition="all 0ms "+this.config.easing,this.sliderFrame.style.transition="all 0ms "+this.config.easing}},{key:"enableTransition",value:function(){this.sliderFrame.style.webkitTransition="all "+this.config.duration+"ms "+this.config.easing,this.sliderFrame.style.transition="all "+this.config.duration+"ms "+this.config.easing}},{key:"goTo",value:function(e,t){if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;this.currentSlide=this.config.loop?e%this.innerElements.length:Math.min(Math.max(e,0),this.innerElements.length-this.perPage),i!==this.currentSlide&&(this.slideToCurrent(),this.config.onChange.call(this),t&&t.call(this))}}},{key:"slideToCurrent",value:function(e){var t=this,i=this.config.loop?this.currentSlide+this.perPage:this.currentSlide,r=(this.config.rtl?1:-1)*i*(this.selectorWidth/this.perPage);e?requestAnimationFrame(function(){requestAnimationFrame(function(){t.enableTransition(),t.sliderFrame.style[t.transformProperty]="translate3d("+r+"px, 0, 0)"})}):this.sliderFrame.style[this.transformProperty]="translate3d("+r+"px, 0, 0)"}},{key:"updateAfterDrag",value:function(){var e=(this.config.rtl?-1:1)*(this.drag.endX-this.drag.startX),t=Math.abs(e),i=this.config.multipleDrag?Math.ceil(t/(this.selectorWidth/this.perPage)):1,r=e>0&&this.currentSlide-i<0,n=e<0&&this.currentSlide+i>this.innerElements.length-this.perPage;e>0&&t>this.config.threshold&&this.innerElements.length>this.perPage?this.prev(i):e<0&&t>this.config.threshold&&this.innerElements.length>this.perPage&&this.next(i),this.slideToCurrent(r||n)}},{key:"resizeHandler",value:function(){this.resolveSlidesNumber(),this.currentSlide+this.perPage>this.innerElements.length&&(this.currentSlide=this.innerElements.length<=this.perPage?0:this.innerElements.length-this.perPage),this.selectorWidth=this.selector.offsetWidth,this.buildSliderFrame()}},{key:"clearDrag",value:function(){this.drag={startX:0,endX:0,startY:0,letItGo:null,preventClick:this.drag.preventClick}}},{key:"touchstartHandler",value:function(e){-1!==["TEXTAREA","OPTION","INPUT","SELECT"].indexOf(e.target.nodeName)||(e.stopPropagation(),this.pointerDown=!0,this.drag.startX=e.touches[0].pageX,this.drag.startY=e.touches[0].pageY)}},{key:"touchendHandler",value:function(e){e.stopPropagation(),this.pointerDown=!1,this.enableTransition(),this.drag.endX&&this.updateAfterDrag(),this.clearDrag()}},{key:"touchmoveHandler",value:function(e){if(e.stopPropagation(),null===this.drag.letItGo&&(this.drag.letItGo=Math.abs(this.drag.startY-e.touches[0].pageY)<Math.abs(this.drag.startX-e.touches[0].pageX)),this.pointerDown&&this.drag.letItGo){e.preventDefault(),this.drag.endX=e.touches[0].pageX,this.sliderFrame.style.webkitTransition="all 0ms "+this.config.easing,this.sliderFrame.style.transition="all 0ms "+this.config.easing;var t=this.config.loop?this.currentSlide+this.perPage:this.currentSlide,i=t*(this.selectorWidth/this.perPage),r=this.drag.endX-this.drag.startX,n=this.config.rtl?i+r:i-r;this.sliderFrame.style[this.transformProperty]="translate3d("+(this.config.rtl?1:-1)*n+"px, 0, 0)"}}},{key:"mousedownHandler",value:function(e){-1!==["TEXTAREA","OPTION","INPUT","SELECT"].indexOf(e.target.nodeName)||(e.preventDefault(),e.stopPropagation(),this.pointerDown=!0,this.drag.startX=e.pageX)}},{key:"mouseupHandler",value:function(e){e.stopPropagation(),this.pointerDown=!1,this.selector.style.cursor="-webkit-grab",this.enableTransition(),this.drag.endX&&this.updateAfterDrag(),this.clearDrag()}},{key:"mousemoveHandler",value:function(e){if(e.preventDefault(),this.pointerDown){"A"===e.target.nodeName&&(this.drag.preventClick=!0),this.drag.endX=e.pageX,this.selector.style.cursor="-webkit-grabbing",this.sliderFrame.style.webkitTransition="all 0ms "+this.config.easing,this.sliderFrame.style.transition="all 0ms "+this.config.easing;var t=this.config.loop?this.currentSlide+this.perPage:this.currentSlide,i=t*(this.selectorWidth/this.perPage),r=this.drag.endX-this.drag.startX,n=this.config.rtl?i+r:i-r;this.sliderFrame.style[this.transformProperty]="translate3d("+(this.config.rtl?1:-1)*n+"px, 0, 0)"}}},{key:"mouseleaveHandler",value:function(e){this.pointerDown&&(this.pointerDown=!1,this.selector.style.cursor="-webkit-grab",this.drag.endX=e.pageX,this.drag.preventClick=!1,this.enableTransition(),this.updateAfterDrag(),this.clearDrag())}},{key:"clickHandler",value:function(e){this.drag.preventClick&&e.preventDefault(),this.drag.preventClick=!1}},{key:"remove",value:function(e,t){if(e<0||e>=this.innerElements.length)throw new Error("Item to remove doesn't exist 😭");var i=e<this.currentSlide,r=this.currentSlide+this.perPage-1===e;(i||r)&&this.currentSlide--,this.innerElements.splice(e,1),this.buildSliderFrame(),t&&t.call(this)}},{key:"insert",value:function(e,t,i){if(t<0||t>this.innerElements.length+1)throw new Error("Unable to inset it at this index 😭");if(-1!==this.innerElements.indexOf(e))throw new Error("The same item in a carousel? Really? Nope 😭");var r=t<=this.currentSlide>0&&this.innerElements.length;this.currentSlide=r?this.currentSlide+1:this.currentSlide,this.innerElements.splice(t,0,e),this.buildSliderFrame(),i&&i.call(this)}},{key:"prepend",value:function(e,t){this.insert(e,0),t&&t.call(this)}},{key:"append",value:function(e,t){this.insert(e,this.innerElements.length+1),t&&t.call(this)}},{key:"destroy",value:function(){var e=arguments.length>0&&void 0!==arguments[0]&&arguments[0],t=arguments[1];if(this.detachEvents(),this.selector.style.cursor="auto",e){for(var i=document.createDocumentFragment(),r=0;r<this.innerElements.length;r++)i.appendChild(this.innerElements[r]);this.selector.innerHTML="",this.selector.appendChild(i),this.selector.removeAttribute("style")}t&&t.call(this)}}],[{key:"mergeSettings",value:function(e){var t={selector:".siema",duration:200,easing:"ease-out",perPage:1,startIndex:0,draggable:!0,multipleDrag:!0,threshold:20,loop:!1,rtl:!1,onInit:function(){},onChange:function(){}},i=e;for(var r in i)t[r]=i[r];return t}},{key:"webkitOrNot",value:function(){return"string"==typeof document.documentElement.style.transform?"transform":"WebkitTransform"}}]),e}();t.default=l,e.exports=t.default}])});
\ No newline at end of file
+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define("Siema",[],t):"object"==typeof exports?exports.Siema=t():e.Siema=t()}("undefined"!=typeof self?self:this,function(){return function(e){function t(n){if(i[n])return i[n].exports;var r=i[n]={i:n,l:!1,exports:{}};return e[n].call(r.exports,r,r.exports,t),r.l=!0,r.exports}var i={};return t.m=e,t.c=i,t.d=function(e,i,n){t.o(e,i)||Object.defineProperty(e,i,{configurable:!1,enumerable:!0,get:n})},t.n=function(e){var i=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(i,"a",i),i},t.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},t.p="",t(t.s=0)}([function(e,t,i){"use strict";function n(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(t,"__esModule",{value:!0});var r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e},s=function(){function e(e,t){for(var i=0;i<t.length;i++){var n=t[i];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(e,n.key,n)}}return function(t,i,n){return i&&e(t.prototype,i),n&&e(t,n),t}}(),o=function(){function e(t){var i=this;if(n(this,e),this.config=e.mergeSettings(t),this.selector="string"==typeof this.config.selector?document.querySelector(this.config.selector):this.config.selector,null===this.selector)throw new Error("Something wrong with your selector 😭");this.resolveSlidesNumber(),this.selectorWidth=this.selector.offsetWidth,this.innerElements=[].slice.call(this.selector.children),this.currentSlide=this.config.loop?this.config.startIndex%this.innerElements.length:Math.max(0,Math.min(this.config.startIndex,this.innerElements.length-this.perPage)),this.transformProperty=e.webkitOrNot(),["resizeHandler","touchstartHandler","touchendHandler","touchmoveHandler","mousedownHandler","mouseupHandler","mouseleaveHandler","mousemoveHandler","clickHandler"].forEach(function(e){i[e]=i[e].bind(i)}),this.init()}return s(e,[{key:"attachEvents",value:function(){window.addEventListener("resize",this.resizeHandler),this.config.draggable&&(this.pointerDown=!1,this.drag={startX:0,endX:0,startY:0,letItGo:null,preventClick:!1},this.selector.addEventListener("touchstart",this.touchstartHandler),this.selector.addEventListener("touchend",this.touchendHandler),this.selector.addEventListener("touchmove",this.touchmoveHandler),this.selector.addEventListener("mousedown",this.mousedownHandler),this.selector.addEventListener("mouseup",this.mouseupHandler),this.selector.addEventListener("mouseleave",this.mouseleaveHandler),this.selector.addEventListener("mousemove",this.mousemoveHandler),this.selector.addEventListener("click",this.clickHandler))}},{key:"detachEvents",value:function(){window.removeEventListener("resize",this.resizeHandler),this.selector.removeEventListener("touchstart",this.touchstartHandler),this.selector.removeEventListener("touchend",this.touchendHandler),this.selector.removeEventListener("touchmove",this.touchmoveHandler),this.selector.removeEventListener("mousedown",this.mousedownHandler),this.selector.removeEventListener("mouseup",this.mouseupHandler),this.selector.removeEventListener("mouseleave",this.mouseleaveHandler),this.selector.removeEventListener("mousemove",this.mousemoveHandler),this.selector.removeEventListener("click",this.clickHandler)}},{key:"init",value:function(){this.attachEvents(),this.selector.style.overflow="hidden",this.selector.style.direction=this.config.rtl?"rtl":"ltr",this.buildSliderFrame(),this.config.onInit.call(this)}},{key:"buildSliderFrame",value:function(){this.widthItem=this.selectorWidth/this.perPage*(1-this.originalOffset);var e=this.config.loop?this.innerElements.length+2*this.perPage:this.innerElements.length;this.sliderFrame=document.createElement("div"),this.sliderFrame.style.width=this.widthItem*e+"px",this.enableTransition(),this.config.draggable&&(this.selector.style.cursor="-webkit-grab");var t=document.createDocumentFragment();if(this.config.loop)for(var i=this.innerElements.length-this.perPage;i<this.innerElements.length;i++){var n=this.buildSliderFrameItem(this.innerElements[i].cloneNode(!0));t.appendChild(n)}for(var r=0;r<this.innerElements.length;r++){var s=this.buildSliderFrameItem(this.innerElements[r]);t.appendChild(s)}if(this.config.loop)for(var o=0;o<this.perPage;o++){var l=this.buildSliderFrameItem(this.innerElements[o].cloneNode(!0));t.appendChild(l)}this.sliderFrame.appendChild(t),this.selector.innerHTML="",this.selector.appendChild(this.sliderFrame),this.slideToCurrent()}},{key:"buildSliderFrameItem",value:function(e){var t=document.createElement("div");return t.style.border="1px solid #000",t.style.cssFloat=this.config.rtl?"right":"left",t.style.float=this.config.rtl?"right":"left",t.style.width=(this.config.loop?100/(this.innerElements.length+2*this.perPage):100/this.innerElements.length)+"%",t.appendChild(e),t}},{key:"resolveSlidesNumber",value:function(){if("number"==typeof this.config.perPage)this.perPage=this.config.perPage;else if("object"===r(this.config.perPage)){this.perPage=1;for(var e in this.config.perPage)window.innerWidth>=e&&(this.perPage=this.config.perPage[e])}if(this.originalOffset=0,this.innerOffset=0,"number"==typeof this.config.offset)return this.originalOffset=this.config.offset>=1?0:this.config.offset,void(this.innerOffset=this.config.center?this.originalOffset/2*this.perPage:this.originalOffset);if("object"===r(this.config.offset))for(var t in this.config.offset)window.innerWidth>=t&&(this.originalOffset=1===this.config.offset[t]?0:this.config.offset[t],this.innerOffset=this.config.center?this.originalOffset/2*this.perPage:this.originalOffset)}},{key:"prev",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:1,t=arguments[1];if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;if(this.config.loop){if(this.currentSlide-e<0){this.disableTransition();var n=this.currentSlide+this.innerElements.length,r=this.perPage,s=n+r,o=(this.config.rtl?1:-1)*s*this.widthItem,l=this.config.draggable?this.drag.endX-this.drag.startX:0;this.sliderFrame.style[this.transformProperty]="translate3d("+(o+l)+"px, 0, 0)",this.currentSlide=n-e}else this.currentSlide=this.currentSlide-e}else this.currentSlide=Math.max(this.currentSlide-e,0);i!==this.currentSlide&&(this.slideToCurrent(this.config.loop),this.config.onChange.call(this),t&&t.call(this))}}},{key:"next",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:1,t=arguments[1];if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;if(this.config.loop){if(this.currentSlide+e>this.innerElements.length-this.perPage){this.disableTransition();var n=this.currentSlide-this.innerElements.length,r=this.perPage,s=n+r,o=(this.config.rtl?1:-1)*s*this.widthItem,l=this.config.draggable?this.drag.endX-this.drag.startX:0;this.sliderFrame.style[this.transformProperty]="translate3d("+(o+l)+"px, 0, 0)",this.currentSlide=n+e}else this.currentSlide=this.currentSlide+e}else this.currentSlide=Math.min(this.currentSlide+e,this.innerElements.length-this.perPage);i!==this.currentSlide&&(this.slideToCurrent(this.config.loop),this.config.onChange.call(this),t&&t.call(this))}}},{key:"disableTransition",value:function(){this.sliderFrame.style.webkitTransition="all 0ms "+this.config.easing,this.sliderFrame.style.transition="all 0ms "+this.config.easing}},{key:"enableTransition",value:function(){this.sliderFrame.style.webkitTransition="all "+this.config.duration+"ms "+this.config.easing,this.sliderFrame.style.transition="all "+this.config.duration+"ms "+this.config.easing}},{key:"goTo",value:function(e,t){if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;this.currentSlide=this.config.loop?e%this.innerElements.length:Math.min(Math.max(e,0),this.innerElements.length-this.perPage),i!==this.currentSlide&&(this.slideToCurrent(),this.config.onChange.call(this),t&&t.call(this))}}},{key:"slideToCurrent",value:function(e){var t=this,i=this.getCurrentOffset();e?requestAnimationFrame(function(){requestAnimationFrame(function(){t.enableTransition(),t.sliderFrame.style[t.transformProperty]="translate3d("+(t.config.rtl?1:-1)*i+"px, 0, 0)"})}):this.sliderFrame.style[this.transformProperty]="translate3d("+(this.config.rtl?1:-1)*i+"px, 0, 0)"}},{key:"updateAfterDrag",value:function(){var e=(this.config.rtl?-1:1)*(this.drag.endX-this.drag.startX),t=Math.abs(e),i=this.config.multipleDrag?Math.ceil(t/this.widthItem):1,n=e>0&&this.currentSlide-i<0,r=e<0&&this.currentSlide+i>this.innerElements.length-this.perPage;e>0&&t>this.config.threshold&&this.innerElements.length>this.perPage?this.prev(i):e<0&&t>this.config.threshold&&this.innerElements.length>this.perPage&&this.next(i),this.slideToCurrent(n||r)}},{key:"resizeHandler",value:function(){this.resolveSlidesNumber(),this.currentSlide+this.perPage>this.innerElements.length&&(this.currentSlide=this.innerElements.length<=this.perPage?0:this.innerElements.length-this.perPage),this.selectorWidth=this.selector.offsetWidth,this.buildSliderFrame()}},{key:"clearDrag",value:function(){this.drag={startX:0,endX:0,startY:0,letItGo:null,preventClick:this.drag.preventClick}}},{key:"touchstartHandler",value:function(e){-1!==["TEXTAREA","OPTION","INPUT","SELECT"].indexOf(e.target.nodeName)||(e.stopPropagation(),this.pointerDown=!0,this.drag.startX=e.touches[0].pageX,this.drag.startY=e.touches[0].pageY)}},{key:"touchendHandler",value:function(e){e.stopPropagation(),this.pointerDown=!1,this.enableTransition(),this.drag.endX&&this.updateAfterDrag(),this.clearDrag()}},{key:"touchmoveHandler",value:function(e){e.stopPropagation(),null===this.drag.letItGo&&(this.drag.letItGo=Math.abs(this.drag.startY-e.touches[0].pageY)<Math.abs(this.drag.startX-e.touches[0].pageX)),this.pointerDown&&this.drag.letItGo&&(e.preventDefault(),this.drag.endX=e.touches[0].pageX,this.translateSliderFrame())}},{key:"mousedownHandler",value:function(e){-1!==["TEXTAREA","OPTION","INPUT","SELECT"].indexOf(e.target.nodeName)||(e.preventDefault(),e.stopPropagation(),this.pointerDown=!0,this.drag.startX=e.pageX)}},{key:"mouseupHandler",value:function(e){e.stopPropagation(),this.pointerDown=!1,this.selector.style.cursor="-webkit-grab",this.enableTransition(),this.drag.endX&&this.updateAfterDrag(),this.clearDrag()}},{key:"mousemoveHandler",value:function(e){e.preventDefault(),this.pointerDown&&("A"===e.target.nodeName&&(this.drag.preventClick=!0),this.drag.endX=e.pageX,this.selector.style.cursor="-webkit-grabbing",this.translateSliderFrame())}},{key:"mouseleaveHandler",value:function(e){this.pointerDown&&(this.pointerDown=!1,this.selector.style.cursor="-webkit-grab",this.drag.endX=e.pageX,this.drag.preventClick=!1,this.enableTransition(),this.updateAfterDrag(),this.clearDrag())}},{key:"getCurrentOffset",value:function(){var e=this.config.loop?this.currentSlide+this.perPage:this.currentSlide;return this.config.center?e*this.widthItem-this.selectorWidth/this.perPage*this.innerOffset:e*this.widthItem}},{key:"getOffset",value:function(){var e=this.getCurrentOffset(),t=this.drag.endX-this.drag.startX;return this.config.rtl?e+t:e-t}},{key:"translateSliderFrame",value:function(){this.sliderFrame.style.webkitTransition="all 0ms "+this.config.easing,this.sliderFrame.style.transition="all 0ms "+this.config.easing;var e=this.getOffset();this.sliderFrame.style[this.transformProperty]="translate3d("+(this.config.rtl?1:-1)*e+"px, 0, 0)"}},{key:"clickHandler",value:function(e){this.drag.preventClick&&e.preventDefault(),this.drag.preventClick=!1}},{key:"remove",value:function(e,t){if(e<0||e>=this.innerElements.length)throw new Error("Item to remove doesn't exist 😭");var i=e<this.currentSlide,n=this.currentSlide+this.perPage-1===e;(i||n)&&this.currentSlide--,this.innerElements.splice(e,1),this.buildSliderFrame(),t&&t.call(this)}},{key:"insert",value:function(e,t,i){if(t<0||t>this.innerElements.length+1)throw new Error("Unable to inset it at this index 😭");if(-1!==this.innerElements.indexOf(e))throw new Error("The same item in a carousel? Really? Nope 😭");var n=t<=this.currentSlide>0&&this.innerElements.length;this.currentSlide=n?this.currentSlide+1:this.currentSlide,this.innerElements.splice(t,0,e),this.buildSliderFrame(),i&&i.call(this)}},{key:"prepend",value:function(e,t){this.insert(e,0),t&&t.call(this)}},{key:"append",value:function(e,t){this.insert(e,this.innerElements.length+1),t&&t.call(this)}},{key:"destroy",value:function(){var e=arguments.length>0&&void 0!==arguments[0]&&arguments[0],t=arguments[1];if(this.detachEvents(),this.selector.style.cursor="auto",e){for(var i=document.createDocumentFragment(),n=0;n<this.innerElements.length;n++)i.appendChild(this.innerElements[n]);this.selector.innerHTML="",this.selector.appendChild(i),this.selector.removeAttribute("style")}t&&t.call(this)}}],[{key:"mergeSettings",value:function(e){var t={selector:".siema",duration:200,easing:"ease-out",center:!1,perPage:1,offset:0,startIndex:0,draggable:!0,multipleDrag:!0,threshold:20,loop:!1,rtl:!1,onInit:function(){},onChange:function(){}},i=e;for(var n in i)t[n]=i[n];return t}},{key:"webkitOrNot",value:function(){return"string"==typeof document.documentElement.style.transform?"transform":"WebkitTransform"}}]),e}();t.default=o,e.exports=t.default}])});
\ No newline at end of file
diff --git a/docs/assets/siema.min.js b/docs/assets/siema.min.js
index 48e29c7..aaf1b94 100644
--- a/docs/assets/siema.min.js
+++ b/docs/assets/siema.min.js
@@ -1 +1 @@
-!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define("Siema",[],t):"object"==typeof exports?exports.Siema=t():e.Siema=t()}("undefined"!=typeof self?self:this,function(){return function(e){function t(r){if(i[r])return i[r].exports;var n=i[r]={i:r,l:!1,exports:{}};return e[r].call(n.exports,n,n.exports,t),n.l=!0,n.exports}var i={};return t.m=e,t.c=i,t.d=function(e,i,r){t.o(e,i)||Object.defineProperty(e,i,{configurable:!1,enumerable:!0,get:r})},t.n=function(e){var i=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(i,"a",i),i},t.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},t.p="",t(t.s=0)}([function(e,t,i){"use strict";function r(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(t,"__esModule",{value:!0});var n="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e},s=function(){function e(e,t){for(var i=0;i<t.length;i++){var r=t[i];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}return function(t,i,r){return i&&e(t.prototype,i),r&&e(t,r),t}}(),l=function(){function e(t){var i=this;if(r(this,e),this.config=e.mergeSettings(t),this.selector="string"==typeof this.config.selector?document.querySelector(this.config.selector):this.config.selector,null===this.selector)throw new Error("Something wrong with your selector 😭");this.resolveSlidesNumber(),this.selectorWidth=this.selector.offsetWidth,this.innerElements=[].slice.call(this.selector.children),this.currentSlide=this.config.loop?this.config.startIndex%this.innerElements.length:Math.max(0,Math.min(this.config.startIndex,this.innerElements.length-this.perPage)),this.transformProperty=e.webkitOrNot(),["resizeHandler","touchstartHandler","touchendHandler","touchmoveHandler","mousedownHandler","mouseupHandler","mouseleaveHandler","mousemoveHandler","clickHandler"].forEach(function(e){i[e]=i[e].bind(i)}),this.init()}return s(e,[{key:"attachEvents",value:function(){window.addEventListener("resize",this.resizeHandler),this.config.draggable&&(this.pointerDown=!1,this.drag={startX:0,endX:0,startY:0,letItGo:null,preventClick:!1},this.selector.addEventListener("touchstart",this.touchstartHandler),this.selector.addEventListener("touchend",this.touchendHandler),this.selector.addEventListener("touchmove",this.touchmoveHandler),this.selector.addEventListener("mousedown",this.mousedownHandler),this.selector.addEventListener("mouseup",this.mouseupHandler),this.selector.addEventListener("mouseleave",this.mouseleaveHandler),this.selector.addEventListener("mousemove",this.mousemoveHandler),this.selector.addEventListener("click",this.clickHandler))}},{key:"detachEvents",value:function(){window.removeEventListener("resize",this.resizeHandler),this.selector.removeEventListener("touchstart",this.touchstartHandler),this.selector.removeEventListener("touchend",this.touchendHandler),this.selector.removeEventListener("touchmove",this.touchmoveHandler),this.selector.removeEventListener("mousedown",this.mousedownHandler),this.selector.removeEventListener("mouseup",this.mouseupHandler),this.selector.removeEventListener("mouseleave",this.mouseleaveHandler),this.selector.removeEventListener("mousemove",this.mousemoveHandler),this.selector.removeEventListener("click",this.clickHandler)}},{key:"init",value:function(){this.attachEvents(),this.selector.style.overflow="hidden",this.selector.style.direction=this.config.rtl?"rtl":"ltr",this.buildSliderFrame(),this.config.onInit.call(this)}},{key:"buildSliderFrame",value:function(){var e=this.selectorWidth/this.perPage,t=this.config.loop?this.innerElements.length+2*this.perPage:this.innerElements.length;this.sliderFrame=document.createElement("div"),this.sliderFrame.style.width=e*t+"px",this.enableTransition(),this.config.draggable&&(this.selector.style.cursor="-webkit-grab");var i=document.createDocumentFragment();if(this.config.loop)for(var r=this.innerElements.length-this.perPage;r<this.innerElements.length;r++){var n=this.buildSliderFrameItem(this.innerElements[r].cloneNode(!0));i.appendChild(n)}for(var s=0;s<this.innerElements.length;s++){var l=this.buildSliderFrameItem(this.innerElements[s]);i.appendChild(l)}if(this.config.loop)for(var o=0;o<this.perPage;o++){var a=this.buildSliderFrameItem(this.innerElements[o].cloneNode(!0));i.appendChild(a)}this.sliderFrame.appendChild(i),this.selector.innerHTML="",this.selector.appendChild(this.sliderFrame),this.slideToCurrent()}},{key:"buildSliderFrameItem",value:function(e){var t=document.createElement("div");return t.style.cssFloat=this.config.rtl?"right":"left",t.style.float=this.config.rtl?"right":"left",t.style.width=(this.config.loop?100/(this.innerElements.length+2*this.perPage):100/this.innerElements.length)+"%",t.appendChild(e),t}},{key:"resolveSlidesNumber",value:function(){if("number"==typeof this.config.perPage)this.perPage=this.config.perPage;else if("object"===n(this.config.perPage)){this.perPage=1;for(var e in this.config.perPage)window.innerWidth>=e&&(this.perPage=this.config.perPage[e])}}},{key:"prev",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:1,t=arguments[1];if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;if(this.config.loop){if(this.currentSlide-e<0){this.disableTransition();var r=this.currentSlide+this.innerElements.length,n=this.perPage,s=r+n,l=(this.config.rtl?1:-1)*s*(this.selectorWidth/this.perPage),o=this.config.draggable?this.drag.endX-this.drag.startX:0;this.sliderFrame.style[this.transformProperty]="translate3d("+(l+o)+"px, 0, 0)",this.currentSlide=r-e}else this.currentSlide=this.currentSlide-e}else this.currentSlide=Math.max(this.currentSlide-e,0);i!==this.currentSlide&&(this.slideToCurrent(this.config.loop),this.config.onChange.call(this),t&&t.call(this))}}},{key:"next",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:1,t=arguments[1];if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;if(this.config.loop){if(this.currentSlide+e>this.innerElements.length-this.perPage){this.disableTransition();var r=this.currentSlide-this.innerElements.length,n=this.perPage,s=r+n,l=(this.config.rtl?1:-1)*s*(this.selectorWidth/this.perPage),o=this.config.draggable?this.drag.endX-this.drag.startX:0;this.sliderFrame.style[this.transformProperty]="translate3d("+(l+o)+"px, 0, 0)",this.currentSlide=r+e}else this.currentSlide=this.currentSlide+e}else this.currentSlide=Math.min(this.currentSlide+e,this.innerElements.length-this.perPage);i!==this.currentSlide&&(this.slideToCurrent(this.config.loop),this.config.onChange.call(this),t&&t.call(this))}}},{key:"disableTransition",value:function(){this.sliderFrame.style.webkitTransition="all 0ms "+this.config.easing,this.sliderFrame.style.transition="all 0ms "+this.config.easing}},{key:"enableTransition",value:function(){this.sliderFrame.style.webkitTransition="all "+this.config.duration+"ms "+this.config.easing,this.sliderFrame.style.transition="all "+this.config.duration+"ms "+this.config.easing}},{key:"goTo",value:function(e,t){if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;this.currentSlide=this.config.loop?e%this.innerElements.length:Math.min(Math.max(e,0),this.innerElements.length-this.perPage),i!==this.currentSlide&&(this.slideToCurrent(),this.config.onChange.call(this),t&&t.call(this))}}},{key:"slideToCurrent",value:function(e){var t=this,i=this.config.loop?this.currentSlide+this.perPage:this.currentSlide,r=(this.config.rtl?1:-1)*i*(this.selectorWidth/this.perPage);e?requestAnimationFrame(function(){requestAnimationFrame(function(){t.enableTransition(),t.sliderFrame.style[t.transformProperty]="translate3d("+r+"px, 0, 0)"})}):this.sliderFrame.style[this.transformProperty]="translate3d("+r+"px, 0, 0)"}},{key:"updateAfterDrag",value:function(){var e=(this.config.rtl?-1:1)*(this.drag.endX-this.drag.startX),t=Math.abs(e),i=this.config.multipleDrag?Math.ceil(t/(this.selectorWidth/this.perPage)):1,r=e>0&&this.currentSlide-i<0,n=e<0&&this.currentSlide+i>this.innerElements.length-this.perPage;e>0&&t>this.config.threshold&&this.innerElements.length>this.perPage?this.prev(i):e<0&&t>this.config.threshold&&this.innerElements.length>this.perPage&&this.next(i),this.slideToCurrent(r||n)}},{key:"resizeHandler",value:function(){this.resolveSlidesNumber(),this.currentSlide+this.perPage>this.innerElements.length&&(this.currentSlide=this.innerElements.length<=this.perPage?0:this.innerElements.length-this.perPage),this.selectorWidth=this.selector.offsetWidth,this.buildSliderFrame()}},{key:"clearDrag",value:function(){this.drag={startX:0,endX:0,startY:0,letItGo:null,preventClick:this.drag.preventClick}}},{key:"touchstartHandler",value:function(e){-1!==["TEXTAREA","OPTION","INPUT","SELECT"].indexOf(e.target.nodeName)||(e.stopPropagation(),this.pointerDown=!0,this.drag.startX=e.touches[0].pageX,this.drag.startY=e.touches[0].pageY)}},{key:"touchendHandler",value:function(e){e.stopPropagation(),this.pointerDown=!1,this.enableTransition(),this.drag.endX&&this.updateAfterDrag(),this.clearDrag()}},{key:"touchmoveHandler",value:function(e){if(e.stopPropagation(),null===this.drag.letItGo&&(this.drag.letItGo=Math.abs(this.drag.startY-e.touches[0].pageY)<Math.abs(this.drag.startX-e.touches[0].pageX)),this.pointerDown&&this.drag.letItGo){e.preventDefault(),this.drag.endX=e.touches[0].pageX,this.sliderFrame.style.webkitTransition="all 0ms "+this.config.easing,this.sliderFrame.style.transition="all 0ms "+this.config.easing;var t=this.config.loop?this.currentSlide+this.perPage:this.currentSlide,i=t*(this.selectorWidth/this.perPage),r=this.drag.endX-this.drag.startX,n=this.config.rtl?i+r:i-r;this.sliderFrame.style[this.transformProperty]="translate3d("+(this.config.rtl?1:-1)*n+"px, 0, 0)"}}},{key:"mousedownHandler",value:function(e){-1!==["TEXTAREA","OPTION","INPUT","SELECT"].indexOf(e.target.nodeName)||(e.preventDefault(),e.stopPropagation(),this.pointerDown=!0,this.drag.startX=e.pageX)}},{key:"mouseupHandler",value:function(e){e.stopPropagation(),this.pointerDown=!1,this.selector.style.cursor="-webkit-grab",this.enableTransition(),this.drag.endX&&this.updateAfterDrag(),this.clearDrag()}},{key:"mousemoveHandler",value:function(e){if(e.preventDefault(),this.pointerDown){"A"===e.target.nodeName&&(this.drag.preventClick=!0),this.drag.endX=e.pageX,this.selector.style.cursor="-webkit-grabbing",this.sliderFrame.style.webkitTransition="all 0ms "+this.config.easing,this.sliderFrame.style.transition="all 0ms "+this.config.easing;var t=this.config.loop?this.currentSlide+this.perPage:this.currentSlide,i=t*(this.selectorWidth/this.perPage),r=this.drag.endX-this.drag.startX,n=this.config.rtl?i+r:i-r;this.sliderFrame.style[this.transformProperty]="translate3d("+(this.config.rtl?1:-1)*n+"px, 0, 0)"}}},{key:"mouseleaveHandler",value:function(e){this.pointerDown&&(this.pointerDown=!1,this.selector.style.cursor="-webkit-grab",this.drag.endX=e.pageX,this.drag.preventClick=!1,this.enableTransition(),this.updateAfterDrag(),this.clearDrag())}},{key:"clickHandler",value:function(e){this.drag.preventClick&&e.preventDefault(),this.drag.preventClick=!1}},{key:"remove",value:function(e,t){if(e<0||e>=this.innerElements.length)throw new Error("Item to remove doesn't exist 😭");var i=e<this.currentSlide,r=this.currentSlide+this.perPage-1===e;(i||r)&&this.currentSlide--,this.innerElements.splice(e,1),this.buildSliderFrame(),t&&t.call(this)}},{key:"insert",value:function(e,t,i){if(t<0||t>this.innerElements.length+1)throw new Error("Unable to inset it at this index 😭");if(-1!==this.innerElements.indexOf(e))throw new Error("The same item in a carousel? Really? Nope 😭");var r=t<=this.currentSlide>0&&this.innerElements.length;this.currentSlide=r?this.currentSlide+1:this.currentSlide,this.innerElements.splice(t,0,e),this.buildSliderFrame(),i&&i.call(this)}},{key:"prepend",value:function(e,t){this.insert(e,0),t&&t.call(this)}},{key:"append",value:function(e,t){this.insert(e,this.innerElements.length+1),t&&t.call(this)}},{key:"destroy",value:function(){var e=arguments.length>0&&void 0!==arguments[0]&&arguments[0],t=arguments[1];if(this.detachEvents(),this.selector.style.cursor="auto",e){for(var i=document.createDocumentFragment(),r=0;r<this.innerElements.length;r++)i.appendChild(this.innerElements[r]);this.selector.innerHTML="",this.selector.appendChild(i),this.selector.removeAttribute("style")}t&&t.call(this)}}],[{key:"mergeSettings",value:function(e){var t={selector:".siema",duration:200,easing:"ease-out",perPage:1,startIndex:0,draggable:!0,multipleDrag:!0,threshold:20,loop:!1,rtl:!1,onInit:function(){},onChange:function(){}},i=e;for(var r in i)t[r]=i[r];return t}},{key:"webkitOrNot",value:function(){return"string"==typeof document.documentElement.style.transform?"transform":"WebkitTransform"}}]),e}();t.default=l,e.exports=t.default}])});
\ No newline at end of file
+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define("Siema",[],t):"object"==typeof exports?exports.Siema=t():e.Siema=t()}("undefined"!=typeof self?self:this,function(){return function(e){function t(n){if(i[n])return i[n].exports;var r=i[n]={i:n,l:!1,exports:{}};return e[n].call(r.exports,r,r.exports,t),r.l=!0,r.exports}var i={};return t.m=e,t.c=i,t.d=function(e,i,n){t.o(e,i)||Object.defineProperty(e,i,{configurable:!1,enumerable:!0,get:n})},t.n=function(e){var i=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(i,"a",i),i},t.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},t.p="",t(t.s=0)}([function(e,t,i){"use strict";function n(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(t,"__esModule",{value:!0});var r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e},s=function(){function e(e,t){for(var i=0;i<t.length;i++){var n=t[i];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(e,n.key,n)}}return function(t,i,n){return i&&e(t.prototype,i),n&&e(t,n),t}}(),o=function(){function e(t){var i=this;if(n(this,e),this.config=e.mergeSettings(t),this.selector="string"==typeof this.config.selector?document.querySelector(this.config.selector):this.config.selector,null===this.selector)throw new Error("Something wrong with your selector 😭");this.resolveSlidesNumber(),this.selectorWidth=this.selector.offsetWidth,this.innerElements=[].slice.call(this.selector.children),this.currentSlide=this.config.loop?this.config.startIndex%this.innerElements.length:Math.max(0,Math.min(this.config.startIndex,this.innerElements.length-this.perPage)),this.transformProperty=e.webkitOrNot(),["resizeHandler","touchstartHandler","touchendHandler","touchmoveHandler","mousedownHandler","mouseupHandler","mouseleaveHandler","mousemoveHandler","clickHandler"].forEach(function(e){i[e]=i[e].bind(i)}),this.init()}return s(e,[{key:"attachEvents",value:function(){window.addEventListener("resize",this.resizeHandler),this.config.draggable&&(this.pointerDown=!1,this.drag={startX:0,endX:0,startY:0,letItGo:null,preventClick:!1},this.selector.addEventListener("touchstart",this.touchstartHandler),this.selector.addEventListener("touchend",this.touchendHandler),this.selector.addEventListener("touchmove",this.touchmoveHandler),this.selector.addEventListener("mousedown",this.mousedownHandler),this.selector.addEventListener("mouseup",this.mouseupHandler),this.selector.addEventListener("mouseleave",this.mouseleaveHandler),this.selector.addEventListener("mousemove",this.mousemoveHandler),this.selector.addEventListener("click",this.clickHandler))}},{key:"detachEvents",value:function(){window.removeEventListener("resize",this.resizeHandler),this.selector.removeEventListener("touchstart",this.touchstartHandler),this.selector.removeEventListener("touchend",this.touchendHandler),this.selector.removeEventListener("touchmove",this.touchmoveHandler),this.selector.removeEventListener("mousedown",this.mousedownHandler),this.selector.removeEventListener("mouseup",this.mouseupHandler),this.selector.removeEventListener("mouseleave",this.mouseleaveHandler),this.selector.removeEventListener("mousemove",this.mousemoveHandler),this.selector.removeEventListener("click",this.clickHandler)}},{key:"init",value:function(){this.attachEvents(),this.selector.style.overflow="hidden",this.selector.style.direction=this.config.rtl?"rtl":"ltr",this.buildSliderFrame(),this.config.onInit.call(this)}},{key:"buildSliderFrame",value:function(){this.widthItem=this.selectorWidth/this.perPage*(1-this.originalOffset);var e=this.config.loop?this.innerElements.length+2*this.perPage:this.innerElements.length;this.sliderFrame=document.createElement("div"),this.sliderFrame.style.width=this.widthItem*e+"px",this.enableTransition(),this.config.draggable&&(this.selector.style.cursor="-webkit-grab");var t=document.createDocumentFragment();if(this.config.loop)for(var i=this.innerElements.length-this.perPage;i<this.innerElements.length;i++){var n=this.buildSliderFrameItem(this.innerElements[i].cloneNode(!0));t.appendChild(n)}for(var r=0;r<this.innerElements.length;r++){var s=this.buildSliderFrameItem(this.innerElements[r]);t.appendChild(s)}if(this.config.loop)for(var o=0;o<this.perPage;o++){var l=this.buildSliderFrameItem(this.innerElements[o].cloneNode(!0));t.appendChild(l)}this.sliderFrame.appendChild(t),this.selector.innerHTML="",this.selector.appendChild(this.sliderFrame),this.slideToCurrent()}},{key:"buildSliderFrameItem",value:function(e){var t=document.createElement("div");return t.style.border="1px solid #000",t.style.cssFloat=this.config.rtl?"right":"left",t.style.float=this.config.rtl?"right":"left",t.style.width=(this.config.loop?100/(this.innerElements.length+2*this.perPage):100/this.innerElements.length)+"%",t.appendChild(e),t}},{key:"resolveSlidesNumber",value:function(){if("number"==typeof this.config.perPage)this.perPage=this.config.perPage;else if("object"===r(this.config.perPage)){this.perPage=1;for(var e in this.config.perPage)window.innerWidth>=e&&(this.perPage=this.config.perPage[e])}if(this.originalOffset=0,this.innerOffset=0,"number"==typeof this.config.offset)return this.originalOffset=this.config.offset>=1?0:this.config.offset,void(this.innerOffset=this.config.center?this.originalOffset/2*this.perPage:this.originalOffset);if("object"===r(this.config.offset))for(var t in this.config.offset)window.innerWidth>=t&&(this.originalOffset=1===this.config.offset[t]?0:this.config.offset[t],this.innerOffset=this.config.center?this.originalOffset/2*this.perPage:this.originalOffset)}},{key:"prev",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:1,t=arguments[1];if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;if(this.config.loop){if(this.currentSlide-e<0){this.disableTransition();var n=this.currentSlide+this.innerElements.length,r=this.perPage,s=n+r,o=(this.config.rtl?1:-1)*s*this.widthItem,l=this.config.draggable?this.drag.endX-this.drag.startX:0;this.sliderFrame.style[this.transformProperty]="translate3d("+(o+l)+"px, 0, 0)",this.currentSlide=n-e}else this.currentSlide=this.currentSlide-e}else this.currentSlide=Math.max(this.currentSlide-e,0);i!==this.currentSlide&&(this.slideToCurrent(this.config.loop),this.config.onChange.call(this),t&&t.call(this))}}},{key:"next",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:1,t=arguments[1];if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;if(this.config.loop){if(this.currentSlide+e>this.innerElements.length-this.perPage){this.disableTransition();var n=this.currentSlide-this.innerElements.length,r=this.perPage,s=n+r,o=(this.config.rtl?1:-1)*s*this.widthItem,l=this.config.draggable?this.drag.endX-this.drag.startX:0;this.sliderFrame.style[this.transformProperty]="translate3d("+(o+l)+"px, 0, 0)",this.currentSlide=n+e}else this.currentSlide=this.currentSlide+e}else this.currentSlide=Math.min(this.currentSlide+e,this.innerElements.length-this.perPage);i!==this.currentSlide&&(this.slideToCurrent(this.config.loop),this.config.onChange.call(this),t&&t.call(this))}}},{key:"disableTransition",value:function(){this.sliderFrame.style.webkitTransition="all 0ms "+this.config.easing,this.sliderFrame.style.transition="all 0ms "+this.config.easing}},{key:"enableTransition",value:function(){this.sliderFrame.style.webkitTransition="all "+this.config.duration+"ms "+this.config.easing,this.sliderFrame.style.transition="all "+this.config.duration+"ms "+this.config.easing}},{key:"goTo",value:function(e,t){if(!(this.innerElements.length<=this.perPage)){var i=this.currentSlide;this.currentSlide=this.config.loop?e%this.innerElements.length:Math.min(Math.max(e,0),this.innerElements.length-this.perPage),i!==this.currentSlide&&(this.slideToCurrent(),this.config.onChange.call(this),t&&t.call(this))}}},{key:"slideToCurrent",value:function(e){var t=this,i=this.getCurrentOffset();e?requestAnimationFrame(function(){requestAnimationFrame(function(){t.enableTransition(),t.sliderFrame.style[t.transformProperty]="translate3d("+(t.config.rtl?1:-1)*i+"px, 0, 0)"})}):this.sliderFrame.style[this.transformProperty]="translate3d("+(this.config.rtl?1:-1)*i+"px, 0, 0)"}},{key:"updateAfterDrag",value:function(){var e=(this.config.rtl?-1:1)*(this.drag.endX-this.drag.startX),t=Math.abs(e),i=this.config.multipleDrag?Math.ceil(t/this.widthItem):1,n=e>0&&this.currentSlide-i<0,r=e<0&&this.currentSlide+i>this.innerElements.length-this.perPage;e>0&&t>this.config.threshold&&this.innerElements.length>this.perPage?this.prev(i):e<0&&t>this.config.threshold&&this.innerElements.length>this.perPage&&this.next(i),this.slideToCurrent(n||r)}},{key:"resizeHandler",value:function(){this.resolveSlidesNumber(),this.currentSlide+this.perPage>this.innerElements.length&&(this.currentSlide=this.innerElements.length<=this.perPage?0:this.innerElements.length-this.perPage),this.selectorWidth=this.selector.offsetWidth,this.buildSliderFrame()}},{key:"clearDrag",value:function(){this.drag={startX:0,endX:0,startY:0,letItGo:null,preventClick:this.drag.preventClick}}},{key:"touchstartHandler",value:function(e){-1!==["TEXTAREA","OPTION","INPUT","SELECT"].indexOf(e.target.nodeName)||(e.stopPropagation(),this.pointerDown=!0,this.drag.startX=e.touches[0].pageX,this.drag.startY=e.touches[0].pageY)}},{key:"touchendHandler",value:function(e){e.stopPropagation(),this.pointerDown=!1,this.enableTransition(),this.drag.endX&&this.updateAfterDrag(),this.clearDrag()}},{key:"touchmoveHandler",value:function(e){e.stopPropagation(),null===this.drag.letItGo&&(this.drag.letItGo=Math.abs(this.drag.startY-e.touches[0].pageY)<Math.abs(this.drag.startX-e.touches[0].pageX)),this.pointerDown&&this.drag.letItGo&&(e.preventDefault(),this.drag.endX=e.touches[0].pageX,this.translateSliderFrame())}},{key:"mousedownHandler",value:function(e){-1!==["TEXTAREA","OPTION","INPUT","SELECT"].indexOf(e.target.nodeName)||(e.preventDefault(),e.stopPropagation(),this.pointerDown=!0,this.drag.startX=e.pageX)}},{key:"mouseupHandler",value:function(e){e.stopPropagation(),this.pointerDown=!1,this.selector.style.cursor="-webkit-grab",this.enableTransition(),this.drag.endX&&this.updateAfterDrag(),this.clearDrag()}},{key:"mousemoveHandler",value:function(e){e.preventDefault(),this.pointerDown&&("A"===e.target.nodeName&&(this.drag.preventClick=!0),this.drag.endX=e.pageX,this.selector.style.cursor="-webkit-grabbing",this.translateSliderFrame())}},{key:"mouseleaveHandler",value:function(e){this.pointerDown&&(this.pointerDown=!1,this.selector.style.cursor="-webkit-grab",this.drag.endX=e.pageX,this.drag.preventClick=!1,this.enableTransition(),this.updateAfterDrag(),this.clearDrag())}},{key:"getCurrentOffset",value:function(){var e=this.config.loop?this.currentSlide+this.perPage:this.currentSlide;return this.config.center?e*this.widthItem-this.selectorWidth/this.perPage*this.innerOffset:e*this.widthItem}},{key:"getOffset",value:function(){var e=this.getCurrentOffset(),t=this.drag.endX-this.drag.startX;return this.config.rtl?e+t:e-t}},{key:"translateSliderFrame",value:function(){this.sliderFrame.style.webkitTransition="all 0ms "+this.config.easing,this.sliderFrame.style.transition="all 0ms "+this.config.easing;var e=this.getOffset();this.sliderFrame.style[this.transformProperty]="translate3d("+(this.config.rtl?1:-1)*e+"px, 0, 0)"}},{key:"clickHandler",value:function(e){this.drag.preventClick&&e.preventDefault(),this.drag.preventClick=!1}},{key:"remove",value:function(e,t){if(e<0||e>=this.innerElements.length)throw new Error("Item to remove doesn't exist 😭");var i=e<this.currentSlide,n=this.currentSlide+this.perPage-1===e;(i||n)&&this.currentSlide--,this.innerElements.splice(e,1),this.buildSliderFrame(),t&&t.call(this)}},{key:"insert",value:function(e,t,i){if(t<0||t>this.innerElements.length+1)throw new Error("Unable to inset it at this index 😭");if(-1!==this.innerElements.indexOf(e))throw new Error("The same item in a carousel? Really? Nope 😭");var n=t<=this.currentSlide>0&&this.innerElements.length;this.currentSlide=n?this.currentSlide+1:this.currentSlide,this.innerElements.splice(t,0,e),this.buildSliderFrame(),i&&i.call(this)}},{key:"prepend",value:function(e,t){this.insert(e,0),t&&t.call(this)}},{key:"append",value:function(e,t){this.insert(e,this.innerElements.length+1),t&&t.call(this)}},{key:"destroy",value:function(){var e=arguments.length>0&&void 0!==arguments[0]&&arguments[0],t=arguments[1];if(this.detachEvents(),this.selector.style.cursor="auto",e){for(var i=document.createDocumentFragment(),n=0;n<this.innerElements.length;n++)i.appendChild(this.innerElements[n]);this.selector.innerHTML="",this.selector.appendChild(i),this.selector.removeAttribute("style")}t&&t.call(this)}}],[{key:"mergeSettings",value:function(e){var t={selector:".siema",duration:200,easing:"ease-out",center:!1,perPage:1,offset:0,startIndex:0,draggable:!0,multipleDrag:!0,threshold:20,loop:!1,rtl:!1,onInit:function(){},onChange:function(){}},i=e;for(var n in i)t[n]=i[n];return t}},{key:"webkitOrNot",value:function(){return"string"==typeof document.documentElement.style.transform?"transform":"WebkitTransform"}}]),e}();t.default=o,e.exports=t.default}])});
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index c1fd8b5..bda887d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "siema",
-  "version": "1.4.13",
+  "version": "1.5.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -16,7 +16,7 @@
       "integrity": "sha1-x1K9IQvvZ5UBtsbLf8hPj0cVjMQ=",
       "dev": true,
       "requires": {
-        "acorn": "4.0.13"
+        "acorn": "^4.0.3"
       },
       "dependencies": {
         "acorn": {
@@ -33,7 +33,7 @@
       "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
       "dev": true,
       "requires": {
-        "acorn": "3.3.0"
+        "acorn": "^3.0.4"
       },
       "dependencies": {
         "acorn": {
@@ -50,10 +50,10 @@
       "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
       "dev": true,
       "requires": {
-        "co": "4.6.0",
-        "fast-deep-equal": "1.0.0",
-        "fast-json-stable-stringify": "2.0.0",
-        "json-schema-traverse": "0.3.1"
+        "co": "^4.6.0",
+        "fast-deep-equal": "^1.0.0",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.3.0"
       }
     },
     "ajv-keywords": {
@@ -68,9 +68,9 @@
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
       "requires": {
-        "kind-of": "3.2.2",
-        "longest": "1.0.1",
-        "repeat-string": "1.6.1"
+        "kind-of": "^3.0.2",
+        "longest": "^1.0.1",
+        "repeat-string": "^1.5.2"
       }
     },
     "ansi-escapes": {
@@ -97,8 +97,8 @@
       "integrity": "sha512-0XNayC8lTHQ2OI8aljNCN3sSx6hsr/1+rlcDAotXJR7C1oZZHCNsfpbKwMjRA3Uqb5tF1Rae2oloTr4xpq+WjA==",
       "dev": true,
       "requires": {
-        "micromatch": "2.3.11",
-        "normalize-path": "2.1.1"
+        "micromatch": "^2.1.5",
+        "normalize-path": "^2.0.0"
       }
     },
     "argparse": {
@@ -107,7 +107,7 @@
       "integrity": "sha1-c9g7wmP4bpf4zE9rrhsOkKfSLIY=",
       "dev": true,
       "requires": {
-        "sprintf-js": "1.0.3"
+        "sprintf-js": "~1.0.2"
       }
     },
     "arr-diff": {
@@ -116,7 +116,7 @@
       "integrity": "sha1-jzuCf5Vai9ZpaX5KQlasPOrjVs8=",
       "dev": true,
       "requires": {
-        "arr-flatten": "1.1.0"
+        "arr-flatten": "^1.0.1"
       }
     },
     "arr-flatten": {
@@ -131,7 +131,7 @@
       "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
       "dev": true,
       "requires": {
-        "array-uniq": "1.0.3"
+        "array-uniq": "^1.0.1"
       }
     },
     "array-uniq": {
@@ -158,9 +158,9 @@
       "integrity": "sha512-b/OsSjvWEo8Pi8H0zsDd2P6Uqo2TK2pH8gNLSJtNLM2Db0v2QaAZ0pBQJXVjAn4gBuugeVDr7s63ZogpUIwWDg==",
       "dev": true,
       "requires": {
-        "bn.js": "4.11.8",
-        "inherits": "2.0.3",
-        "minimalistic-assert": "1.0.0"
+        "bn.js": "^4.0.0",
+        "inherits": "^2.0.1",
+        "minimalistic-assert": "^1.0.0"
       }
     },
     "assert": {
@@ -178,7 +178,7 @@
       "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
       "dev": true,
       "requires": {
-        "lodash": "4.17.4"
+        "lodash": "^4.14.0"
       }
     },
     "async-each": {
@@ -199,52 +199,52 @@
       "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
       "dev": true,
       "requires": {
-        "chalk": "1.1.3",
-        "esutils": "2.0.2",
-        "js-tokens": "3.0.2"
+        "chalk": "^1.1.3",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.2"
       }
     },
     "babel-core": {
-      "version": "6.26.0",
-      "resolved": "https://registry.npmjs.org/babel-core/-/babel-core-6.26.0.tgz",
-      "integrity": "sha1-rzL3izGm/O8RnIew/Y2XU/A6C7g=",
-      "dev": true,
-      "requires": {
-        "babel-code-frame": "6.26.0",
-        "babel-generator": "6.26.0",
-        "babel-helpers": "6.24.1",
-        "babel-messages": "6.23.0",
-        "babel-register": "6.26.0",
-        "babel-runtime": "6.26.0",
-        "babel-template": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0",
-        "babylon": "6.18.0",
-        "convert-source-map": "1.5.0",
-        "debug": "2.6.9",
-        "json5": "0.5.1",
-        "lodash": "4.17.4",
-        "minimatch": "3.0.4",
-        "path-is-absolute": "1.0.1",
-        "private": "0.1.8",
-        "slash": "1.0.0",
-        "source-map": "0.5.7"
+      "version": "6.26.3",
+      "resolved": "https://registry.npmjs.org/babel-core/-/babel-core-6.26.3.tgz",
+      "integrity": "sha512-6jyFLuDmeidKmUEb3NM+/yawG0M2bDZ9Z1qbZP59cyHLz8kYGKYwpJP0UwUKKUiTRNvxfLesJnTedqczP7cTDA==",
+      "dev": true,
+      "requires": {
+        "babel-code-frame": "^6.26.0",
+        "babel-generator": "^6.26.0",
+        "babel-helpers": "^6.24.1",
+        "babel-messages": "^6.23.0",
+        "babel-register": "^6.26.0",
+        "babel-runtime": "^6.26.0",
+        "babel-template": "^6.26.0",
+        "babel-traverse": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "babylon": "^6.18.0",
+        "convert-source-map": "^1.5.1",
+        "debug": "^2.6.9",
+        "json5": "^0.5.1",
+        "lodash": "^4.17.4",
+        "minimatch": "^3.0.4",
+        "path-is-absolute": "^1.0.1",
+        "private": "^0.1.8",
+        "slash": "^1.0.0",
+        "source-map": "^0.5.7"
       }
     },
     "babel-generator": {
-      "version": "6.26.0",
-      "resolved": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.26.0.tgz",
-      "integrity": "sha1-rBriAHC3n248odMmlhMFN3TyDcU=",
+      "version": "6.26.1",
+      "resolved": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.26.1.tgz",
+      "integrity": "sha512-HyfwY6ApZj7BYTcJURpM5tznulaBvyio7/0d4zFOeMPUmfxkCjHocCuoLa2SAGzBI8AREcH3eP3758F672DppA==",
       "dev": true,
       "requires": {
-        "babel-messages": "6.23.0",
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0",
-        "detect-indent": "4.0.0",
-        "jsesc": "1.3.0",
-        "lodash": "4.17.4",
-        "source-map": "0.5.7",
-        "trim-right": "1.0.1"
+        "babel-messages": "^6.23.0",
+        "babel-runtime": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "detect-indent": "^4.0.0",
+        "jsesc": "^1.3.0",
+        "lodash": "^4.17.4",
+        "source-map": "^0.5.7",
+        "trim-right": "^1.0.1"
       }
     },
     "babel-helper-call-delegate": {
@@ -253,10 +253,10 @@
       "integrity": "sha1-7Oaqzdx25Bw0YfiL/Fdb0Nqi340=",
       "dev": true,
       "requires": {
-        "babel-helper-hoist-variables": "6.24.1",
-        "babel-runtime": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-helper-hoist-variables": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
       }
     },
     "babel-helper-define-map": {
@@ -265,10 +265,10 @@
       "integrity": "sha1-pfVtq0GiX5fstJjH66ypgZ+Vvl8=",
       "dev": true,
       "requires": {
-        "babel-helper-function-name": "6.24.1",
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0",
-        "lodash": "4.17.4"
+        "babel-helper-function-name": "^6.24.1",
+        "babel-runtime": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "lodash": "^4.17.4"
       }
     },
     "babel-helper-function-name": {
@@ -277,11 +277,11 @@
       "integrity": "sha1-00dbjAPtmCQqJbSDUasYOZ01gKk=",
       "dev": true,
       "requires": {
-        "babel-helper-get-function-arity": "6.24.1",
-        "babel-runtime": "6.26.0",
-        "babel-template": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-helper-get-function-arity": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "babel-template": "^6.24.1",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
       }
     },
     "babel-helper-get-function-arity": {
@@ -290,8 +290,8 @@
       "integrity": "sha1-j3eCqpNAfEHTqlCQj4mwMbG2hT0=",
       "dev": true,
       "requires": {
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0"
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@@ -778,7 +778,7 @@
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-        "repeat-element": "1.1.2"
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@@ -875,9 +875,9 @@
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@@ -925,8 +925,8 @@
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@@ -935,11 +935,11 @@
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@@ -987,7 +987,7 @@
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       "dev": true,
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@@ -1081,9 +1081,9 @@
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-      "integrity": "sha1-ms1whRxtXf3ZPZKC5e35SgP/RrU=",
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@@ -1114,10 +1114,10 @@
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@@ -1126,12 +1126,12 @@
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@@ -1140,9 +1140,9 @@
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-        "which": "1.3.0"
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-        "randombytes": "2.0.6",
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@@ -1170,7 +1170,7 @@
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@@ -1206,13 +1206,13 @@
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-        "rimraf": "2.6.2"
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@@ -1221,8 +1221,8 @@
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@@ -1231,7 +1231,7 @@
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       "dev": true,
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@@ -1240,9 +1240,9 @@
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-        "randombytes": "2.0.6"
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@@ -1251,7 +1251,7 @@
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@@ -1266,13 +1266,13 @@
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@@ -1287,10 +1287,10 @@
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-        "object-assign": "4.1.1",
-        "tapable": "0.2.8"
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@@ -1299,7 +1299,7 @@
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+        "prr": "~1.0.1"
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@@ -1308,7 +1308,7 @@
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@@ -1352,11 +1352,11 @@
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@@ -1365,8 +1365,8 @@
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+        "d": "1",
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@@ -1375,10 +1375,10 @@
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-            "supports-color": "4.5.0"
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@@ -1491,7 +1491,7 @@
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@@ -1500,7 +1500,7 @@
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           "dev": true,
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@@ -1511,11 +1511,11 @@
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-        "object-hash": "1.2.0",
-        "rimraf": "2.6.2"
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@@ -1524,8 +1524,8 @@
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-        "esrecurse": "4.2.0",
-        "estraverse": "4.2.0"
+        "esrecurse": "^4.1.0",
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@@ -1540,8 +1540,8 @@
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-        "acorn": "5.4.1",
-        "acorn-jsx": "3.0.1"
+        "acorn": "^5.2.1",
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@@ -1556,7 +1556,7 @@
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       "dev": true,
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-        "estraverse": "4.2.0"
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@@ -1565,8 +1565,8 @@
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-        "object-assign": "4.1.1"
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@@ -1587,8 +1587,8 @@
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-        "d": "1.0.0",
-        "es5-ext": "0.10.38"
+        "d": "1",
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@@ -1603,8 +1603,8 @@
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-        "md5.js": "1.3.4",
-        "safe-buffer": "5.1.1"
+        "md5.js": "^1.3.4",
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@@ -1613,13 +1613,13 @@
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-        "signal-exit": "3.0.2",
-        "strip-eof": "1.0.0"
+        "cross-spawn": "^5.0.1",
+        "get-stream": "^3.0.0",
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+        "npm-run-path": "^2.0.0",
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+        "signal-exit": "^3.0.0",
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@@ -1628,7 +1628,7 @@
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       "dev": true,
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+        "is-posix-bracket": "^0.1.0"
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@@ -1637,7 +1637,7 @@
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       "dev": true,
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-        "fill-range": "2.2.3"
+        "fill-range": "^2.1.0"
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@@ -1646,9 +1646,9 @@
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-        "chardet": "0.4.2",
-        "iconv-lite": "0.4.19",
-        "tmp": "0.0.33"
+        "chardet": "^0.4.0",
+        "iconv-lite": "^0.4.17",
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@@ -1657,7 +1657,7 @@
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       "dev": true,
       "requires": {
-        "is-extglob": "1.0.0"
+        "is-extglob": "^1.0.0"
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@@ -1684,7 +1684,7 @@
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       "dev": true,
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-        "escape-string-regexp": "1.0.5"
+        "escape-string-regexp": "^1.0.5"
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@@ -1693,8 +1693,8 @@
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       "dev": true,
       "requires": {
-        "flat-cache": "1.3.0",
-        "object-assign": "4.1.1"
+        "flat-cache": "^1.2.1",
+        "object-assign": "^4.0.1"
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@@ -1709,11 +1709,11 @@
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-        "isobject": "2.1.0",
-        "randomatic": "1.1.7",
-        "repeat-element": "1.1.2",
-        "repeat-string": "1.6.1"
+        "is-number": "^2.1.0",
+        "isobject": "^2.0.0",
+        "randomatic": "^1.1.3",
+        "repeat-element": "^1.1.2",
+        "repeat-string": "^1.5.2"
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@@ -1722,9 +1722,9 @@
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       "dev": true,
       "requires": {
-        "commondir": "1.0.1",
-        "make-dir": "1.0.0",
-        "pkg-dir": "2.0.0"
+        "commondir": "^1.0.1",
+        "make-dir": "^1.0.0",
+        "pkg-dir": "^2.0.0"
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@@ -1733,7 +1733,7 @@
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       "dev": true,
       "requires": {
-        "locate-path": "2.0.0"
+        "locate-path": "^2.0.0"
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@@ -1742,10 +1742,10 @@
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       "dev": true,
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-        "circular-json": "0.3.3",
-        "del": "2.2.2",
-        "graceful-fs": "4.1.11",
-        "write": "0.2.1"
+        "circular-json": "^0.3.1",
+        "del": "^2.0.2",
+        "graceful-fs": "^4.1.2",
+        "write": "^0.2.1"
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@@ -1760,7 +1760,7 @@
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       "dev": true,
       "requires": {
-        "for-in": "1.0.2"
+        "for-in": "^1.0.1"
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@@ -1776,8 +1776,8 @@
       "dev": true,
       "optional": true,
       "requires": {
-        "nan": "2.8.0",
-        "node-pre-gyp": "0.6.39"
+        "nan": "^2.3.0",
+        "node-pre-gyp": "^0.6.39"
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@@ -1792,8 +1792,8 @@
           "dev": true,
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           "requires": {
-            "co": "4.6.0",
-            "json-stable-stringify": "1.0.1"
+            "co": "^4.6.0",
+            "json-stable-stringify": "^1.0.1"
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@@ -1813,8 +1813,8 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "delegates": "1.0.0",
-            "readable-stream": "2.2.9"
+            "delegates": "^1.0.0",
+            "readable-stream": "^2.0.6"
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@@ -1858,7 +1858,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "tweetnacl": "0.14.5"
+            "tweetnacl": "^0.14.3"
           }
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@@ -1866,7 +1866,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "inherits": "2.0.3"
+            "inherits": "~2.0.0"
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@@ -1874,7 +1874,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "hoek": "2.16.3"
+            "hoek": "2.x.x"
           }
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@@ -1882,7 +1882,7 @@
           "bundled": true,
           "dev": true,
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-            "balanced-match": "0.4.2",
+            "balanced-match": "^0.4.1",
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@@ -1913,7 +1913,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "delayed-stream": "1.0.0"
+            "delayed-stream": "~1.0.0"
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@@ -1936,7 +1936,7 @@
           "bundled": true,
           "dev": true,
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-            "boom": "2.10.1"
+            "boom": "2.x.x"
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@@ -1945,7 +1945,7 @@
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+            "assert-plus": "^1.0.0"
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@@ -1994,7 +1994,7 @@
           "dev": true,
           "optional": true,
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+            "jsbn": "~0.1.0"
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         "extend": {
@@ -2020,9 +2020,9 @@
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           "requires": {
-            "asynckit": "0.4.0",
-            "combined-stream": "1.0.5",
-            "mime-types": "2.1.15"
+            "asynckit": "^0.4.0",
+            "combined-stream": "^1.0.5",
+            "mime-types": "^2.1.12"
           }
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@@ -2035,10 +2035,10 @@
           "bundled": true,
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-            "graceful-fs": "4.1.11",
-            "inherits": "2.0.3",
-            "mkdirp": "0.5.1",
-            "rimraf": "2.6.1"
+            "graceful-fs": "^4.1.2",
+            "inherits": "~2.0.0",
+            "mkdirp": ">=0.5 0",
+            "rimraf": "2"
           }
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@@ -2047,9 +2047,9 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "fstream": "1.0.11",
-            "inherits": "2.0.3",
-            "minimatch": "3.0.4"
+            "fstream": "^1.0.0",
+            "inherits": "2",
+            "minimatch": "^3.0.0"
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         "gauge": {
@@ -2058,14 +2058,14 @@
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-            "string-width": "1.0.2",
-            "strip-ansi": "3.0.1",
-            "wide-align": "1.1.2"
+            "aproba": "^1.0.3",
+            "console-control-strings": "^1.0.0",
+            "has-unicode": "^2.0.0",
+            "object-assign": "^4.1.0",
+            "signal-exit": "^3.0.0",
+            "string-width": "^1.0.1",
+            "strip-ansi": "^3.0.1",
+            "wide-align": "^1.1.0"
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@@ -2074,7 +2074,7 @@
           "dev": true,
           "optional": true,
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+            "assert-plus": "^1.0.0"
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@@ -2090,12 +2090,12 @@
           "bundled": true,
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-            "inflight": "1.0.6",
-            "inherits": "2.0.3",
-            "minimatch": "3.0.4",
-            "once": "1.4.0",
-            "path-is-absolute": "1.0.1"
+            "fs.realpath": "^1.0.0",
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "^3.0.4",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
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@@ -2115,8 +2115,8 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "ajv": "4.11.8",
-            "har-schema": "1.0.5"
+            "ajv": "^4.9.1",
+            "har-schema": "^1.0.5"
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@@ -2130,10 +2130,10 @@
           "bundled": true,
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-            "boom": "2.10.1",
-            "cryptiles": "2.0.5",
-            "hoek": "2.16.3",
-            "sntp": "1.0.9"
+            "boom": "2.x.x",
+            "cryptiles": "2.x.x",
+            "hoek": "2.x.x",
+            "sntp": "1.x.x"
           }
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@@ -2147,9 +2147,9 @@
           "dev": true,
           "optional": true,
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-            "assert-plus": "0.2.0",
-            "jsprim": "1.4.0",
-            "sshpk": "1.13.0"
+            "assert-plus": "^0.2.0",
+            "jsprim": "^1.2.2",
+            "sshpk": "^1.7.0"
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         "inflight": {
@@ -2157,8 +2157,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "once": "1.4.0",
-            "wrappy": "1.0.2"
+            "once": "^1.3.0",
+            "wrappy": "1"
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@@ -2177,7 +2177,7 @@
           "bundled": true,
           "dev": true,
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-            "number-is-nan": "1.0.1"
+            "number-is-nan": "^1.0.0"
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@@ -2203,7 +2203,7 @@
           "dev": true,
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+            "jsbn": "~0.1.0"
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@@ -2224,7 +2224,7 @@
           "dev": true,
           "optional": true,
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+            "jsonify": "~0.0.0"
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@@ -2269,7 +2269,7 @@
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           "dev": true,
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+            "mime-db": "~1.27.0"
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@@ -2277,7 +2277,7 @@
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           "dev": true,
           "requires": {
-            "brace-expansion": "1.1.7"
+            "brace-expansion": "^1.1.7"
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@@ -2305,17 +2305,17 @@
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           "optional": true,
           "requires": {
-            "detect-libc": "1.0.2",
+            "detect-libc": "^1.0.2",
             "hawk": "3.1.3",
-            "mkdirp": "0.5.1",
-            "nopt": "4.0.1",
-            "npmlog": "4.1.0",
-            "rc": "1.2.1",
+            "mkdirp": "^0.5.1",
+            "nopt": "^4.0.1",
+            "npmlog": "^4.0.2",
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-            "semver": "5.3.0",
-            "tar": "2.2.1",
-            "tar-pack": "3.4.0"
+            "rimraf": "^2.6.1",
+            "semver": "^5.3.0",
+            "tar": "^2.2.1",
+            "tar-pack": "^3.4.0"
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@@ -2324,8 +2324,8 @@
           "dev": true,
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           "requires": {
-            "abbrev": "1.1.0",
-            "osenv": "0.1.4"
+            "abbrev": "1",
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@@ -2334,10 +2334,10 @@
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-            "console-control-strings": "1.1.0",
-            "gauge": "2.7.4",
-            "set-blocking": "2.0.0"
+            "are-we-there-yet": "~1.1.2",
+            "console-control-strings": "~1.1.0",
+            "gauge": "~2.7.3",
+            "set-blocking": "~2.0.0"
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@@ -2362,7 +2362,7 @@
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           "dev": true,
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+            "wrappy": "1"
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@@ -2383,8 +2383,8 @@
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           "optional": true,
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-            "os-tmpdir": "1.0.2"
+            "os-homedir": "^1.0.0",
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@@ -2421,10 +2421,10 @@
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-            "minimist": "1.2.0",
-            "strip-json-comments": "2.0.1"
+            "deep-extend": "~0.4.0",
+            "ini": "~1.3.0",
+            "minimist": "^1.2.0",
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@@ -2440,13 +2440,13 @@
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+            "string_decoder": "~1.0.0",
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@@ -2455,28 +2455,28 @@
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-            "tunnel-agent": "0.6.0",
-            "uuid": "3.0.1"
+            "aws-sign2": "~0.6.0",
+            "aws4": "^1.2.1",
+            "caseless": "~0.12.0",
+            "combined-stream": "~1.0.5",
+            "extend": "~3.0.0",
+            "forever-agent": "~0.6.1",
+            "form-data": "~2.1.1",
+            "har-validator": "~4.2.1",
+            "hawk": "~3.1.3",
+            "http-signature": "~1.1.0",
+            "is-typedarray": "~1.0.0",
+            "isstream": "~0.1.2",
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+            "oauth-sign": "~0.8.1",
+            "performance-now": "^0.2.0",
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+            "safe-buffer": "^5.0.1",
+            "stringstream": "~0.0.4",
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+            "tunnel-agent": "^0.6.0",
+            "uuid": "^3.0.0"
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@@ -2484,7 +2484,7 @@
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+            "glob": "^7.0.5"
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@@ -2515,7 +2515,7 @@
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           "dev": true,
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+            "hoek": "2.x.x"
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@@ -2524,15 +2524,15 @@
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-            "jodid25519": "1.0.2",
-            "jsbn": "0.1.1",
-            "tweetnacl": "0.14.5"
+            "asn1": "~0.2.3",
+            "assert-plus": "^1.0.0",
+            "bcrypt-pbkdf": "^1.0.0",
+            "dashdash": "^1.12.0",
+            "ecc-jsbn": "~0.1.1",
+            "getpass": "^0.1.1",
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@@ -2548,9 +2548,9 @@
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-            "is-fullwidth-code-point": "1.0.0",
-            "strip-ansi": "3.0.1"
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@@ -2558,7 +2558,7 @@
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+            "safe-buffer": "^5.0.1"
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@@ -2572,7 +2572,7 @@
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+            "ansi-regex": "^2.0.0"
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@@ -2586,9 +2586,9 @@
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-            "fstream": "1.0.11",
-            "inherits": "2.0.3"
+            "block-stream": "*",
+            "fstream": "^1.0.2",
+            "inherits": "2"
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@@ -2597,14 +2597,14 @@
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-            "readable-stream": "2.2.9",
-            "rimraf": "2.6.1",
-            "tar": "2.2.1",
-            "uid-number": "0.0.6"
+            "debug": "^2.2.0",
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+            "once": "^1.3.3",
+            "readable-stream": "^2.1.4",
+            "rimraf": "^2.5.1",
+            "tar": "^2.2.1",
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@@ -2613,7 +2613,7 @@
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           "optional": true,
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+            "punycode": "^1.4.1"
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@@ -2622,7 +2622,7 @@
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           "optional": true,
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+            "safe-buffer": "^5.0.1"
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@@ -2663,7 +2663,7 @@
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           "optional": true,
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+            "string-width": "^1.0.2"
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@@ -2697,12 +2697,12 @@
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-        "inherits": "2.0.3",
-        "minimatch": "3.0.4",
-        "once": "1.4.0",
-        "path-is-absolute": "1.0.1"
+        "fs.realpath": "^1.0.0",
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+        "inherits": "2",
+        "minimatch": "^3.0.4",
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@@ -2711,8 +2711,8 @@
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       "dev": true,
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-        "glob-parent": "2.0.0",
-        "is-glob": "2.0.1"
+        "glob-parent": "^2.0.0",
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@@ -2721,7 +2721,7 @@
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       "dev": true,
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+        "is-glob": "^2.0.0"
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@@ -2736,12 +2736,12 @@
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-        "glob": "7.1.2",
-        "object-assign": "4.1.1",
-        "pify": "2.3.0",
-        "pinkie-promise": "2.0.1"
+        "array-union": "^1.0.1",
+        "arrify": "^1.0.0",
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+        "object-assign": "^4.0.1",
+        "pify": "^2.0.0",
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@@ -2756,7 +2756,7 @@
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       "dev": true,
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+        "ansi-regex": "^2.0.0"
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@@ -2771,7 +2771,7 @@
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       "dev": true,
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+        "inherits": "^2.0.1"
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@@ -2780,8 +2780,8 @@
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-        "inherits": "2.0.3",
-        "minimalistic-assert": "1.0.0"
+        "inherits": "^2.0.3",
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@@ -2790,9 +2790,9 @@
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-        "minimalistic-assert": "1.0.0",
-        "minimalistic-crypto-utils": "1.0.1"
+        "hash.js": "^1.0.3",
+        "minimalistic-assert": "^1.0.0",
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@@ -2801,8 +2801,8 @@
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       "dev": true,
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-        "os-tmpdir": "1.0.2"
+        "os-homedir": "^1.0.0",
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@@ -2853,8 +2853,8 @@
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-        "once": "1.4.0",
-        "wrappy": "1.0.2"
+        "once": "^1.3.0",
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@@ -2869,20 +2869,20 @@
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-        "figures": "2.0.0",
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-        "strip-ansi": "4.0.0",
-        "through": "2.3.8"
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@@ -2897,7 +2897,7 @@
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+            "color-convert": "^1.9.0"
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@@ -2906,9 +2906,9 @@
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-            "escape-string-regexp": "1.0.5",
-            "supports-color": "4.5.0"
+            "ansi-styles": "^3.1.0",
+            "escape-string-regexp": "^1.0.5",
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@@ -2917,7 +2917,7 @@
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+            "ansi-regex": "^3.0.0"
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@@ -2926,7 +2926,7 @@
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           "dev": true,
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+            "has-flag": "^2.0.0"
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@@ -2943,7 +2943,7 @@
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       "dev": true,
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+        "loose-envify": "^1.0.0"
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@@ -2964,7 +2964,7 @@
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       "dev": true,
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+        "binary-extensions": "^1.0.0"
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@@ -2979,7 +2979,7 @@
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       "dev": true,
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+        "builtin-modules": "^1.0.0"
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@@ -2994,7 +2994,7 @@
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       "dev": true,
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+        "is-primitive": "^2.0.0"
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@@ -3015,7 +3015,7 @@
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       "dev": true,
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+        "number-is-nan": "^1.0.0"
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@@ -3030,7 +3030,7 @@
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       "dev": true,
       "requires": {
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+        "is-extglob": "^1.0.0"
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@@ -3039,7 +3039,7 @@
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       "dev": true,
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+        "kind-of": "^3.0.2"
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@@ -3054,7 +3054,7 @@
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       "dev": true,
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+        "is-path-inside": "^1.0.0"
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@@ -3063,7 +3063,7 @@
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       "dev": true,
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+        "path-is-inside": "^1.0.1"
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@@ -3129,8 +3129,8 @@
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-        "argparse": "1.0.9",
-        "esprima": "4.0.0"
+        "argparse": "^1.0.7",
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@@ -3169,7 +3169,7 @@
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       "dev": true,
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+        "is-buffer": "^1.1.5"
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       "dev": true,
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+        "invert-kv": "^1.0.0"
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@@ -3193,8 +3193,8 @@
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       "dev": true,
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-        "type-check": "0.3.2"
+        "prelude-ls": "~1.1.2",
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-        "parse-json": "2.2.0",
-        "pify": "2.3.0",
-        "strip-bom": "3.0.0"
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@@ -3215,7 +3215,7 @@
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-            "mkdirp": "0.5.1",
-            "pkg-dir": "1.0.0"
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@@ -3236,8 +3236,8 @@
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@@ -3255,7 +3255,7 @@
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-        "emojis-list": "2.1.0",
-        "json5": "0.5.1"
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@@ -3283,14 +3283,14 @@
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-        "path-exists": "3.0.0"
+        "p-locate": "^2.0.0",
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-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
-      "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4=",
+      "version": "4.17.10",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.10.tgz",
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@@ -3305,7 +3305,7 @@
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-        "pseudomap": "1.0.2",
-        "yallist": "2.1.2"
+        "pseudomap": "^1.0.2",
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       "dev": true,
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@@ -3333,8 +3333,8 @@
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+        "hash-base": "^3.0.0",
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@@ -3343,8 +3343,8 @@
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@@ -3355,7 +3355,7 @@
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@@ -3364,8 +3364,8 @@
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-        "readable-stream": "2.3.3"
+        "errno": "^0.1.3",
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@@ -3374,19 +3374,19 @@
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+        "braces": "^1.8.2",
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-        "brorand": "1.1.0"
+        "bn.js": "^4.0.0",
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+        "brace-expansion": "^1.1.7"
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-        "events": "1.1.1",
-        "https-browserify": "1.0.0",
-        "os-browserify": "0.3.0",
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+        "buffer": "^4.3.0",
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-        "stream-http": "2.8.0",
-        "string_decoder": "1.0.3",
-        "timers-browserify": "2.0.6",
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+        "punycode": "^1.2.4",
+        "querystring-es3": "^0.2.0",
+        "readable-stream": "^2.3.3",
+        "stream-browserify": "^2.0.1",
+        "stream-http": "^2.7.2",
+        "string_decoder": "^1.0.0",
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-        "util": "0.10.3",
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-        "is-builtin-module": "1.0.0",
-        "semver": "5.5.0",
-        "validate-npm-package-license": "3.0.1"
+        "hosted-git-info": "^2.1.4",
+        "is-builtin-module": "^1.0.0",
+        "semver": "2 || 3 || 4 || 5",
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@@ -3515,7 +3515,7 @@
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       "dev": true,
       "requires": {
-        "remove-trailing-separator": "1.1.0"
+        "remove-trailing-separator": "^1.0.1"
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@@ -3524,7 +3524,7 @@
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       "dev": true,
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+        "path-key": "^2.0.0"
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@@ -3551,8 +3551,8 @@
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       "dev": true,
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-        "is-extendable": "0.1.1"
+        "for-own": "^0.1.4",
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@@ -3561,7 +3561,7 @@
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       "dev": true,
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-        "wrappy": "1.0.2"
+        "wrappy": "1"
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@@ -3570,7 +3570,7 @@
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       "dev": true,
       "requires": {
-        "mimic-fn": "1.2.0"
+        "mimic-fn": "^1.0.0"
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@@ -3579,12 +3579,12 @@
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-        "prelude-ls": "1.1.2",
-        "type-check": "0.3.2",
-        "wordwrap": "1.0.0"
+        "deep-is": "~0.1.3",
+        "fast-levenshtein": "~2.0.4",
+        "levn": "~0.3.0",
+        "prelude-ls": "~1.1.2",
+        "type-check": "~0.3.2",
+        "wordwrap": "~1.0.0"
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@@ -3605,9 +3605,9 @@
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-        "lcid": "1.0.0",
-        "mem": "1.1.0"
+        "execa": "^0.7.0",
+        "lcid": "^1.0.0",
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@@ -3634,7 +3634,7 @@
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       "dev": true,
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+        "p-limit": "^1.1.0"
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@@ -3649,11 +3649,11 @@
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-        "create-hash": "1.1.3",
-        "evp_bytestokey": "1.0.3",
-        "pbkdf2": "3.0.14"
+        "asn1.js": "^4.0.0",
+        "browserify-aes": "^1.0.0",
+        "create-hash": "^1.1.0",
+        "evp_bytestokey": "^1.0.0",
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@@ -3662,10 +3662,10 @@
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-        "is-dotfile": "1.0.3",
-        "is-extglob": "1.0.0",
-        "is-glob": "2.0.1"
+        "glob-base": "^0.3.0",
+        "is-dotfile": "^1.0.0",
+        "is-extglob": "^1.0.0",
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@@ -3674,7 +3674,7 @@
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       "dev": true,
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+        "error-ex": "^1.2.0"
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@@ -3713,7 +3713,7 @@
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       "dev": true,
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-        "pify": "2.3.0"
+        "pify": "^2.0.0"
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@@ -3722,11 +3722,11 @@
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-        "ripemd160": "2.0.1",
-        "safe-buffer": "5.1.1",
-        "sha.js": "2.4.10"
+        "create-hash": "^1.1.2",
+        "create-hmac": "^1.1.4",
+        "ripemd160": "^2.0.1",
+        "safe-buffer": "^5.0.1",
+        "sha.js": "^2.4.8"
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@@ -3747,7 +3747,7 @@
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       "dev": true,
       "requires": {
-        "pinkie": "2.0.4"
+        "pinkie": "^2.0.0"
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@@ -3756,7 +3756,7 @@
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       "dev": true,
       "requires": {
-        "find-up": "2.1.0"
+        "find-up": "^2.1.0"
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@@ -3819,11 +3819,11 @@
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       "dev": true,
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-        "browserify-rsa": "4.0.1",
-        "create-hash": "1.1.3",
-        "parse-asn1": "5.1.0",
-        "randombytes": "2.0.6"
+        "bn.js": "^4.1.0",
+        "browserify-rsa": "^4.0.0",
+        "create-hash": "^1.1.0",
+        "parse-asn1": "^5.0.0",
+        "randombytes": "^2.0.1"
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@@ -3850,8 +3850,8 @@
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       "dev": true,
       "requires": {
-        "is-number": "3.0.0",
-        "kind-of": "4.0.0"
+        "is-number": "^3.0.0",
+        "kind-of": "^4.0.0"
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@@ -3860,7 +3860,7 @@
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           "dev": true,
           "requires": {
-            "kind-of": "3.2.2"
+            "kind-of": "^3.0.2"
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@@ -3869,7 +3869,7 @@
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               "dev": true,
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+                "is-buffer": "^1.1.5"
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@@ -3880,7 +3880,7 @@
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           "dev": true,
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@@ -3891,7 +3891,7 @@
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       "dev": true,
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+        "safe-buffer": "^5.1.0"
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@@ -3900,8 +3900,8 @@
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-        "randombytes": "2.0.6",
-        "safe-buffer": "5.1.1"
+        "randombytes": "^2.0.5",
+        "safe-buffer": "^5.1.0"
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@@ -3910,9 +3910,9 @@
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-        "normalize-package-data": "2.4.0",
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     },
     "xtend": {
@@ -4742,19 +4742,19 @@
       "integrity": "sha1-YpmpBVsc78lp/355wdkY3Osiw2A=",
       "dev": true,
       "requires": {
-        "camelcase": "4.1.0",
-        "cliui": "3.2.0",
-        "decamelize": "1.2.0",
-        "get-caller-file": "1.0.2",
-        "os-locale": "2.1.0",
-        "read-pkg-up": "2.0.0",
-        "require-directory": "2.1.1",
-        "require-main-filename": "1.0.1",
-        "set-blocking": "2.0.0",
-        "string-width": "2.1.1",
-        "which-module": "2.0.0",
-        "y18n": "3.2.1",
-        "yargs-parser": "7.0.0"
+        "camelcase": "^4.1.0",
+        "cliui": "^3.2.0",
+        "decamelize": "^1.1.1",
+        "get-caller-file": "^1.0.1",
+        "os-locale": "^2.0.0",
+        "read-pkg-up": "^2.0.0",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^1.0.1",
+        "set-blocking": "^2.0.0",
+        "string-width": "^2.0.0",
+        "which-module": "^2.0.0",
+        "y18n": "^3.2.1",
+        "yargs-parser": "^7.0.0"
       },
       "dependencies": {
         "camelcase": {
@@ -4769,9 +4769,9 @@
           "integrity": "sha1-EgYBU3qRbSmUD5NNo7SNWFo5IT0=",
           "dev": true,
           "requires": {
-            "string-width": "1.0.2",
-            "strip-ansi": "3.0.1",
-            "wrap-ansi": "2.1.0"
+            "string-width": "^1.0.1",
+            "strip-ansi": "^3.0.1",
+            "wrap-ansi": "^2.0.0"
           },
           "dependencies": {
             "string-width": {
@@ -4780,9 +4780,9 @@
               "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
               "dev": true,
               "requires": {
-                "code-point-at": "1.1.0",
-                "is-fullwidth-code-point": "1.0.0",
-                "strip-ansi": "3.0.1"
+                "code-point-at": "^1.0.0",
+                "is-fullwidth-code-point": "^1.0.0",
+                "strip-ansi": "^3.0.0"
               }
             }
           }
@@ -4793,7 +4793,7 @@
           "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
           "dev": true,
           "requires": {
-            "number-is-nan": "1.0.1"
+            "number-is-nan": "^1.0.0"
           }
         }
       }
@@ -4804,7 +4804,7 @@
       "integrity": "sha1-jQrELxbqVd69MyyvTEA4s+P139k=",
       "dev": true,
       "requires": {
-        "camelcase": "4.1.0"
+        "camelcase": "^4.1.0"
       },
       "dependencies": {
         "camelcase": {
diff --git a/package.json b/package.json
index d8bff28..cfd0a2e 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "dist/siema.min.js",
   "devDependencies": {
     "babel": "^6.23.0",
-    "babel-core": "^6.26.0",
+    "babel-core": "^6.26.3",
     "babel-loader": "^7.1.2",
     "babel-plugin-add-module-exports": "^0.2.1",
     "babel-preset-es2015": "^6.24.1",
diff --git a/src/siema.js b/src/siema.js
index 83b4c93..188892d 100644
--- a/src/siema.js
+++ b/src/siema.js
@@ -18,7 +18,7 @@ export default class Siema {
       throw new Error('Something wrong with your selector 😭');
     }
 
-    // update perPage number dependable of user value
+    // update perPage number and offset dependable of user value
     this.resolveSlidesNumber();
 
     // Create global references
@@ -49,7 +49,9 @@ export default class Siema {
       selector: '.siema',
       duration: 200,
       easing: 'ease-out',
+      center: false,
       perPage: 1,
+      offset: 0,
       startIndex: 0,
       draggable: true,
       multipleDrag: true,
@@ -152,17 +154,16 @@ export default class Siema {
     this.config.onInit.call(this);
   }
 
-
   /**
    * Build a sliderFrame and slide to a current item.
    */
   buildSliderFrame() {
-    const widthItem = this.selectorWidth / this.perPage;
+    this.widthItem = this.selectorWidth / this.perPage * (1 - this.originalOffset);
     const itemsToBuild = this.config.loop ? this.innerElements.length + (2 * this.perPage) : this.innerElements.length;
 
     // Create frame and apply styling
     this.sliderFrame = document.createElement('div');
-    this.sliderFrame.style.width = `${widthItem * itemsToBuild}px`;
+    this.sliderFrame.style.width = `${this.widthItem * itemsToBuild}px`;
     this.enableTransition();
 
     if (this.config.draggable) {
@@ -210,9 +211,8 @@ export default class Siema {
     return elementContainer;
   }
 
-
   /**
-   * Determinates slides number accordingly to clients viewport.
+   * Determinates slides number and innerOffset accordingly to clients viewport.
    */
   resolveSlidesNumber() {
     if (typeof this.config.perPage === 'number') {
@@ -226,8 +226,27 @@ export default class Siema {
         }
       }
     }
-  }
 
+    // Setup original offset and innerOffset
+    // Keep original offset for witdhItem calculation
+    this.originalOffset = 0;
+    this.innerOffset = 0;
+
+    if (typeof this.config.offset === 'number') {
+      this.originalOffset = this.config.offset >= 1 ? 0 : this.config.offset;
+      this.innerOffset = this.config.center ? this.originalOffset / 2 * this.perPage : this.originalOffset;
+      return;
+    }
+
+    if (typeof this.config.offset === 'object') {
+      for (const viewport in this.config.offset) {
+        if (window.innerWidth >= viewport) {
+          this.originalOffset = this.config.offset[viewport] === 1 ? 0 : this.config.offset[viewport];
+          this.innerOffset = this.config.center ? this.originalOffset / 2 * this.perPage : this.originalOffset;
+        }
+      }
+    }
+  }
 
   /**
    * Go to previous slide.
@@ -250,7 +269,7 @@ export default class Siema {
         const mirrorSlideIndex = this.currentSlide + this.innerElements.length;
         const mirrorSlideIndexOffset = this.perPage;
         const moveTo = mirrorSlideIndex + mirrorSlideIndexOffset;
-        const offset = (this.config.rtl ? 1 : -1) * moveTo * (this.selectorWidth / this.perPage);
+        const offset = (this.config.rtl ? 1 : -1) * moveTo * this.widthItem;
         const dragDistance = this.config.draggable ? this.drag.endX - this.drag.startX : 0;
 
         this.sliderFrame.style[this.transformProperty] = `translate3d(${offset + dragDistance}px, 0, 0)`;
@@ -295,7 +314,7 @@ export default class Siema {
         const mirrorSlideIndex = this.currentSlide - this.innerElements.length;
         const mirrorSlideIndexOffset = this.perPage;
         const moveTo = mirrorSlideIndex + mirrorSlideIndexOffset;
-        const offset = (this.config.rtl ? 1 : -1) * moveTo * (this.selectorWidth / this.perPage);
+        const offset = (this.config.rtl ? 1 : -1) * moveTo * this.widthItem;
         const dragDistance = this.config.draggable ? this.drag.endX - this.drag.startX : 0;
 
         this.sliderFrame.style[this.transformProperty] = `translate3d(${offset + dragDistance}px, 0, 0)`;
@@ -363,8 +382,7 @@ export default class Siema {
    * Moves sliders frame to position of currently active slide
    */
   slideToCurrent(enableTransition) {
-    const currentSlide = this.config.loop ? this.currentSlide + this.perPage : this.currentSlide;
-    const offset = (this.config.rtl ? 1 : -1) * currentSlide * (this.selectorWidth / this.perPage);
+    const offset = this.getCurrentOffset();
 
     if (enableTransition) {
       // This one is tricky, I know but this is a perfect explanation:
@@ -372,23 +390,22 @@ export default class Siema {
       requestAnimationFrame(() => {
         requestAnimationFrame(() => {
           this.enableTransition();
-          this.sliderFrame.style[this.transformProperty] = `translate3d(${offset}px, 0, 0)`;
+          this.sliderFrame.style[this.transformProperty] = `translate3d(${(this.config.rtl ? 1 : -1) * offset}px, 0, 0)`;
         });
       });
     }
     else {
-      this.sliderFrame.style[this.transformProperty] = `translate3d(${offset}px, 0, 0)`;
+      this.sliderFrame.style[this.transformProperty] = `translate3d(${(this.config.rtl ? 1 : -1) * offset}px, 0, 0)`;
     }
   }
 
-
   /**
    * Recalculate drag /swipe event and reposition the frame of a slider
    */
   updateAfterDrag() {
     const movement = (this.config.rtl ? -1 : 1) * (this.drag.endX - this.drag.startX);
     const movementDistance = Math.abs(movement);
-    const howManySliderToSlide = this.config.multipleDrag ? Math.ceil(movementDistance / (this.selectorWidth / this.perPage)) : 1;
+    const howManySliderToSlide = this.config.multipleDrag ? Math.ceil(movementDistance / this.widthItem) : 1;
 
     const slideToNegativeClone = movement > 0 && this.currentSlide - howManySliderToSlide < 0;
     const slideToPositiveClone = movement < 0 && this.currentSlide + howManySliderToSlide > this.innerElements.length - this.perPage;
@@ -480,18 +497,10 @@ export default class Siema {
     if (this.pointerDown && this.drag.letItGo) {
       e.preventDefault();
       this.drag.endX = e.touches[0].pageX;
-      this.sliderFrame.style.webkitTransition = `all 0ms ${this.config.easing}`;
-      this.sliderFrame.style.transition = `all 0ms ${this.config.easing}`;
-
-      const currentSlide = this.config.loop ? this.currentSlide + this.perPage : this.currentSlide;
-      const currentOffset = currentSlide * (this.selectorWidth / this.perPage);
-      const dragOffset = (this.drag.endX - this.drag.startX);
-      const offset = this.config.rtl ? currentOffset + dragOffset : currentOffset - dragOffset;
-      this.sliderFrame.style[this.transformProperty] = `translate3d(${(this.config.rtl ? 1 : -1) * offset}px, 0, 0)`;
+      this.translateSliderFrame();
     }
   }
 
-
   /**
    * mousedown event handler
    */
@@ -539,18 +548,11 @@ export default class Siema {
 
       this.drag.endX = e.pageX;
       this.selector.style.cursor = '-webkit-grabbing';
-      this.sliderFrame.style.webkitTransition = `all 0ms ${this.config.easing}`;
-      this.sliderFrame.style.transition = `all 0ms ${this.config.easing}`;
 
-      const currentSlide = this.config.loop ? this.currentSlide + this.perPage : this.currentSlide;
-      const currentOffset = currentSlide * (this.selectorWidth / this.perPage);
-      const dragOffset = (this.drag.endX - this.drag.startX);
-      const offset = this.config.rtl ? currentOffset + dragOffset : currentOffset - dragOffset;
-      this.sliderFrame.style[this.transformProperty] = `translate3d(${(this.config.rtl ? 1 : -1) * offset}px, 0, 0)`;
+      this.translateSliderFrame();
     }
   }
 
-
   /**
    * mouseleave event handler
    */
@@ -566,6 +568,36 @@ export default class Siema {
     }
   }
 
+  /**
+   * Get currentOffset based on current slide and innerOffset
+   * @returns {number}
+   */
+  getCurrentOffset() {
+    const currentSlide = this.config.loop ? this.currentSlide + this.perPage : this.currentSlide;
+    return this.config.center ? currentSlide * this.widthItem - this.selectorWidth / this.perPage * this.innerOffset : currentSlide * this.widthItem;
+  }
+
+  /**
+   * Get new offset based on currentOffset and dragged value
+   * @returns {number}
+   */
+  getOffset() {
+    const currentOffset = this.getCurrentOffset();
+    const dragOffset = (this.drag.endX - this.drag.startX);
+    return this.config.rtl ? currentOffset + dragOffset : currentOffset - dragOffset;
+  }
+
+  /**
+   * Apply translate3d on carousel with new offset calculation
+   *
+   */
+  translateSliderFrame() {
+    this.sliderFrame.style.webkitTransition = `all 0ms ${this.config.easing}`;
+    this.sliderFrame.style.transition = `all 0ms ${this.config.easing}`;
+
+    const offset = this.getOffset();
+    this.sliderFrame.style[this.transformProperty] = `translate3d(${(this.config.rtl ? 1 : -1) * offset}px, 0, 0)`;
+  }
 
   /**
    * click event handler