diff --git a/dist/gss.js b/dist/gss.js
index e042effa..f0de380e 100644
--- a/dist/gss.js
+++ b/dist/gss.js
@@ -1,3 +1,4 @@
+/* gss-engine - version 2.0.0 (2015-01-26) - http://gridstylesheets.org */
 /* gss-engine - version 1.0.4-beta (2015-01-27) - http://gridstylesheets.org */
 (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
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diff --git a/dist/gss.min.js b/dist/gss.min.js
index 601e3a08..b5d5cce3 100644
--- a/dist/gss.min.js
+++ b/dist/gss.min.js
@@ -1,4 +1,4 @@
-/* gss-engine - version 1.0.4-beta (2015-01-27) - http://gridstylesheets.org */
+/* gss-engine - version 2.0.0 (2015-01-26) - http://gridstylesheets.org */
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a.Expression(c),d.call(this,b,e,f),this.expression.addExpression(c,-1)}a.assert(this.strength instanceof a.Strength,"_strength not set")},toString:function(){return d.prototype.toString.call(this)+" = 0)"}})}(this.c||b.parent.exports||{}),function(a){"use strict";a.EditInfo=a.inherit({initialize:function(a,b,c,d,e){this.constraint=a,this.editPlus=b,this.editMinus=c,this.prevEditConstant=d,this.index=e},toString:function(){return"<cn="+this.constraint+", ep="+this.editPlus+", em="+this.editMinus+", pec="+this.prevEditConstant+", index="+this.index+">"}})}(this.c||b.parent.exports||{}),function(a){"use strict";a.Tableau=a.inherit({initialize:function(){this.columns=new a.HashTable,this.rows=new a.HashTable,this._infeasibleRows=new a.HashSet,this._externalRows=new a.HashSet,this._externalParametricVars=new a.HashSet},noteRemovedVariable:function(b,c){a.trace&&console.log("c.Tableau::noteRemovedVariable: ",b,c);var d=this.columns.get(b);c&&d&&d["delete"](c)},noteAddedVariable:function(a,b){b&&this.insertColVar(a,b)},getInternalInfo:function(){var a="Tableau Information:\n";return a+="Rows: "+this.rows.size,a+=" (= "+(this.rows.size-1)+" constraints)",a+="\nColumns: "+this.columns.size,a+="\nInfeasible Rows: "+this._infeasibleRows.size,a+="\nExternal basic variables: "+this._externalRows.size,a+="\nExternal parametric variables: ",a+=this._externalParametricVars.size,a+="\n"},toString:function(){var a="Tableau:\n";return this.rows.each(function(b,c){a+=b,a+=" <==> ",a+=c,a+="\n"}),a+="\nColumns:\n",a+=this.columns,a+="\nInfeasible rows: ",a+=this._infeasibleRows,a+="External basic variables: ",a+=this._externalRows,a+="External parametric variables: ",a+=this._externalParametricVars},insertColVar:function(b,c){var d=this.columns.get(b);d||(d=new a.HashSet,this.columns.set(b,d)),d.add(c)},addRow:function(b,c){a.trace&&a.fnenterprint("addRow: "+b+", "+c),this.rows.set(b,c),c.terms.each(function(a){this.insertColVar(a,b),a.isExternal&&this._externalParametricVars.add(a)},this),b.isExternal&&this._externalRows.add(b),a.trace&&a.traceprint(this.toString())},removeColumn:function(b){a.trace&&a.fnenterprint("removeColumn:"+b);var c=this.columns.get(b);c?(this.columns["delete"](b),c.each(function(a){var c=this.rows.get(a);c.terms["delete"](b)},this)):a.trace&&console.log("Could not find var",b,"in columns"),b.isExternal&&(this._externalRows["delete"](b),this._externalParametricVars["delete"](b))},removeRow:function(b){a.trace&&a.fnenterprint("removeRow:"+b);var c=this.rows.get(b);return a.assert(null!=c),c.terms.each(function(c){var d=this.columns.get(c);null!=d&&(a.trace&&console.log("removing from varset:",b),d["delete"](b))},this),this._infeasibleRows["delete"](b),b.isExternal&&this._externalRows["delete"](b),this.rows["delete"](b),a.trace&&a.fnexitprint("returning 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a.HashTable,this._editVarList=[],this._slackCounter=0,this._artificialCounter=0,this._dummyCounter=0,this.autoSolve=!0,this._needsSolving=!1,this._optimizeCount=0,this.rows.set(this._objective,a.Expression.empty()),this._editVariableStack=[0],a.trace&&a.traceprint("objective expr == "+this.rows.get(this._objective))},add:function(){for(var a=0;a<arguments.length;a++)this.addConstraint(arguments[a]);return this},_addEditConstraint:function(b,c,d){var e=this._editVarMap.size,f=c[0],g=c[1],h=new a.EditInfo(b,f,g,d,e);this._editVarMap.set(b.variable,h),this._editVarList[e]={v:b.variable,info:h}},addConstraint:function(b){a.trace&&a.fnenterprint("addConstraint: "+b);var c=new Array(2),d=new Array(1),e=this.newExpression(b,c,d);return d=d[0],this.tryAddingDirectly(e)||this.addWithArtificialVariable(e),this._needsSolving=!0,b.isEditConstraint&&this._addEditConstraint(b,c,d),this.autoSolve&&(this.optimize(this._objective),this._setExternalVariables()),this},addConstraintNoException:function(b){a.trace&&a.fnenterprint("addConstraintNoException: "+b);try{return this.addConstraint(b),!0}catch(c){return!1}},addEditVar:function(b,c,d){return a.trace&&a.fnenterprint("addEditVar: "+b+" @ "+c+" {"+d+"}"),this.addConstraint(new a.EditConstraint(b,c||a.Strength.strong,d))},beginEdit:function(){return a.assert(this._editVarMap.size>0,"_editVarMap.size > 0"),this._infeasibleRows.clear(),this._resetStayConstants(),this._editVariableStack[this._editVariableStack.length]=this._editVarMap.size,this},endEdit:function(){return a.assert(this._editVarMap.size>0,"_editVarMap.size > 0"),this.resolve(),this._editVariableStack.pop(),this.removeEditVarsTo(this._editVariableStack[this._editVariableStack.length-1]),this},removeAllEditVars:function(){return this.removeEditVarsTo(0)},removeEditVarsTo:function(b){try{for(var c=this._editVarList.length,d=b;c>d;d++)this._editVarList[d]&&this.removeConstraint(this._editVarMap.get(this._editVarList[d].v).constraint);return this._editVarList.length=b,a.assert(this._editVarMap.size==b,"_editVarMap.size == n"),this}catch(e){throw new a.InternalError("Constraint not found in removeEditVarsTo")}},addPointStays:function(b){return a.trace&&console.log("addPointStays",b),b.forEach(function(a,b){this.addStay(a.x,e,Math.pow(2,b)),this.addStay(a.y,e,Math.pow(2,b))},this),this},addStay:function(b,c,d){var f=new a.StayConstraint(b,c||e,d||1);return this.addConstraint(f)},removeConstraint:function(b){a.trace&&a.fnenterprint("removeConstraintInternal: "+b),a.trace&&a.traceprint(this.toString()),this._needsSolving=!0,this._resetStayConstants();var c=this.rows.get(this._objective),d=this._errorVars.get(b);a.trace&&a.traceprint("eVars == "+d),null!=d&&d.each(function(e){var f=this.rows.get(e);null==f?c.addVariable(e,-b.weight*b.strength.symbolicWeight.value,this._objective,this):c.addExpression(f,-b.weight*b.strength.symbolicWeight.value,this._objective,this),a.trace&&a.traceprint("now eVars == "+d)},this);var e=this._markerVars.get(b);if(this._markerVars["delete"](b),null==e)throw new a.InternalError("Constraint not found in removeConstraintInternal");if(a.trace&&a.traceprint("Looking to remove var "+e),null==this.rows.get(e)){var f=this.columns.get(e);a.trace&&a.traceprint("Must pivot -- columns are "+f);var g=null,h=0;f.each(function(b){if(b.isRestricted){var c=this.rows.get(b),d=c.coefficientFor(e);if(a.trace&&a.traceprint("Marker "+e+"'s coefficient in "+c+" is "+d),0>d){var f=-c.constant/d;(null==g||h>f||a.approx(f,h)&&b.hashCode<g.hashCode)&&(h=f,g=b)}}},this),null==g&&(a.trace&&a.traceprint("exitVar is still null"),f.each(function(a){if(a.isRestricted){var b=this.rows.get(a),c=b.coefficientFor(e),d=b.constant/c;(null==g||h>d)&&(h=d,g=a)}},this)),null==g&&(0==f.size?this.removeColumn(e):f.escapingEach(function(a){return a!=this._objective?(g=a,{brk:!0}):void 0},this)),null!=g&&this.pivot(e,g)}if(null!=this.rows.get(e)&&this.removeRow(e),null!=d&&d.each(function(a){a!=e&&this.removeColumn(a)},this),b.isStayConstraint){if(null!=d)for(var i=0;i<this._stayPlusErrorVars.length;i++)d["delete"](this._stayPlusErrorVars[i]),d["delete"](this._stayMinusErrorVars[i])}else if(b.isEditConstraint){a.assert(null!=d,"eVars != null");var j=this._editVarMap.get(b.variable);this.removeColumn(j.editMinus),this._editVarMap["delete"](b.variable)}return null!=d&&this._errorVars["delete"](d),this.autoSolve&&(this.optimize(this._objective),this._setExternalVariables()),this},reset:function(){throw a.trace&&a.fnenterprint("reset"),new a.InternalError("reset not implemented")},resolveArray:function(b){a.trace&&a.fnenterprint("resolveArray"+b);var c=b.length;this._editVarMap.each(function(a,d){var e=d.index;c>e&&this.suggestValue(a,b[e])},this),this.resolve()},resolvePair:function(a,b){this.suggestValue(this._editVarList[0].v,a),this.suggestValue(this._editVarList[1].v,b),this.resolve()},resolve:function(){a.trace&&a.fnenterprint("resolve()"),this.dualOptimize(),this._setExternalVariables(),this._infeasibleRows.clear(),this._resetStayConstants()},suggestValue:function(b,c){a.trace&&console.log("suggestValue("+b+", "+c+")");var d=this._editVarMap.get(b);if(!d)throw new a.Error("suggestValue for variable "+b+", but var is not an edit variable");var e=c-d.prevEditConstant;return d.prevEditConstant=c,this.deltaEditConstant(e,d.editPlus,d.editMinus),this},solve:function(){return this._needsSolving&&(this.optimize(this._objective),this._setExternalVariables()),this},setEditedValue:function(b,c){if(!this.columnsHasKey(b)&&null==this.rows.get(b))return b.value=c,this;if(!a.approx(c,b.value)){this.addEditVar(b),this.beginEdit();try{this.suggestValue(b,c)}catch(d){throw new a.InternalError("Error in setEditedValue")}this.endEdit()}return this},addVar:function(b){if(!this.columnsHasKey(b)&&null==this.rows.get(b)){try{this.addStay(b)}catch(c){throw new a.InternalError("Error in addVar -- required failure is impossible")}a.trace&&a.traceprint("added initial stay on "+b)}return this},getInternalInfo:function(){var a=c.getInternalInfo.call(this);return a+="\nSolver info:\n",a+="Stay Error Variables: ",a+=this._stayPlusErrorVars.length+this._stayMinusErrorVars.length,a+=" ("+this._stayPlusErrorVars.length+" +, ",a+=this._stayMinusErrorVars.length+" -)\n",a+="Edit Variables: "+this._editVarMap.size,a+="\n"},getDebugInfo:function(){return this.toString()+this.getInternalInfo()+"\n"},toString:function(){var a=c.getInternalInfo.call(this);return a+="\n_stayPlusErrorVars: ",a+="["+this._stayPlusErrorVars+"]",a+="\n_stayMinusErrorVars: ",a+="["+this._stayMinusErrorVars+"]",a+="\n",a+="_editVarMap:\n"+this._editVarMap,a+="\n"},addWithArtificialVariable:function(b){a.trace&&a.fnenterprint("addWithArtificialVariable: "+b);var c=new a.SlackVariable({value:++this._artificialCounter,prefix:"a"}),d=new a.ObjectiveVariable({name:"az"}),e=b.clone();a.trace&&a.traceprint("before addRows:\n"+this),this.addRow(d,e),this.addRow(c,b),a.trace&&a.traceprint("after addRows:\n"+this),this.optimize(d);var f=this.rows.get(d);if(a.trace&&a.traceprint("azTableauRow.constant == "+f.constant),!a.approx(f.constant,0))throw this.removeRow(d),this.removeColumn(c),new a.RequiredFailure;var g=this.rows.get(c);if(null!=g){if(g.isConstant)return this.removeRow(c),void this.removeRow(d);var h=g.anyPivotableVariable();this.pivot(h,c)}a.assert(null==this.rows.get(c),"rowExpression(av) == null"),this.removeColumn(c),this.removeRow(d)},tryAddingDirectly:function(b){a.trace&&a.fnenterprint("tryAddingDirectly: "+b);var c=this.chooseSubject(b);return null==c?(a.trace&&a.fnexitprint("returning false"),!1):(b.newSubject(c),this.columnsHasKey(c)&&this.substituteOut(c,b),this.addRow(c,b),a.trace&&a.fnexitprint("returning true"),!0)},chooseSubject:function(b){a.trace&&a.fnenterprint("chooseSubject: "+b);var c=null,d=!1,e=!1,f=b.terms,g=f.escapingEach(function(a,b){if(d){if(!a.isRestricted&&!this.columnsHasKey(a))return{retval:a}}else if(a.isRestricted){if(!e&&!a.isDummy&&0>b){var f=this.columns.get(a);(null==f||1==f.size&&this.columnsHasKey(this._objective))&&(c=a,e=!0)}}else c=a,d=!0},this);if(g&&void 0!==g.retval)return g.retval;if(null!=c)return c;var h=0,g=f.escapingEach(function(a,b){return a.isDummy?void(this.columnsHasKey(a)||(c=a,h=b)):{retval:null}},this);if(g&&void 0!==g.retval)return g.retval;if(!a.approx(b.constant,0))throw new a.RequiredFailure;return h>0&&b.multiplyMe(-1),c},deltaEditConstant:function(b,c,d){a.trace&&a.fnenterprint("deltaEditConstant :"+b+", "+c+", "+d);var e=this.rows.get(c);if(null!=e)return e.constant+=b,void(e.constant<0&&this._infeasibleRows.add(c));var f=this.rows.get(d);if(null!=f)return f.constant+=-b,void(f.constant<0&&this._infeasibleRows.add(d));var g=this.columns.get(d);g||console.log("columnVars is null -- tableau is:\n"+this),g.each(function(a){var c=this.rows.get(a),e=c.coefficientFor(d);c.constant+=e*b,a.isRestricted&&c.constant<0&&this._infeasibleRows.add(a)},this)},dualOptimize:function(){a.trace&&a.fnenterprint("dualOptimize:");for(var b=this.rows.get(this._objective);this._infeasibleRows.size;){var c=this._infeasibleRows.values()[0];this._infeasibleRows["delete"](c);var d=null,e=this.rows.get(c);if(e&&e.constant<0){var f,g=Number.MAX_VALUE,h=e.terms;if(h.each(function(c,e){if(e>0&&c.isPivotable){var h=b.coefficientFor(c);f=h/e,(g>f||a.approx(f,g)&&c.hashCode<d.hashCode)&&(d=c,g=f)}}),g==Number.MAX_VALUE)throw new a.InternalError("ratio == nil (MAX_VALUE) in dualOptimize");this.pivot(d,c)}}},newExpression:function(b,c,d){a.trace&&(a.fnenterprint("newExpression: "+b),a.traceprint("cn.isInequality == "+b.isInequality),a.traceprint("cn.required == "+b.required));var e=b.expression,f=a.Expression.fromConstant(e.constant),g=new a.SlackVariable,h=new a.DummyVariable,i=new a.SlackVariable,j=new a.SlackVariable,k=e.terms;if(k.each(function(a,b){var c=this.rows.get(a);c?f.addExpression(c,b):f.addVariable(a,b)},this),b.isInequality){if(a.trace&&a.traceprint("Inequality, adding slack"),++this._slackCounter,g=new a.SlackVariable({value:this._slackCounter,prefix:"s"}),f.setVariable(g,-1),this._markerVars.set(b,g),!b.required){++this._slackCounter,i=new a.SlackVariable({value:this._slackCounter,prefix:"em"}),f.setVariable(i,1);
 var l=this.rows.get(this._objective);l.setVariable(i,b.strength.symbolicWeight.value*b.weight),this.insertErrorVar(b,i),this.noteAddedVariable(i,this._objective)}}else if(b.required)a.trace&&a.traceprint("Equality, required"),++this._dummyCounter,h=new a.DummyVariable({value:this._dummyCounter,prefix:"d"}),c[0]=h,c[1]=h,d[0]=e.constant,f.setVariable(h,1),this._markerVars.set(b,h),a.trace&&a.traceprint("Adding dummyVar == d"+this._dummyCounter);else{a.trace&&a.traceprint("Equality, not required"),++this._slackCounter,j=new a.SlackVariable({value:this._slackCounter,prefix:"ep"}),i=new a.SlackVariable({value:this._slackCounter,prefix:"em"}),f.setVariable(j,-1),f.setVariable(i,1),this._markerVars.set(b,j);var l=this.rows.get(this._objective);a.trace&&console.log(l);var m=b.strength.symbolicWeight.value*b.weight;0==m&&(a.trace&&a.traceprint("cn == "+b),a.trace&&a.traceprint("adding "+j+" and "+i+" with swCoeff == 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a=J(),a===Qb&&(a=N(),a===Qb&&(a=K(),a===Qb&&(a=ui,b.substr(ui,4)===Zd?(c=Zd,ui+=4):(c=Qb,0===Ai&&g($d)),c!==Qb&&(vi=a,c=_d()),a=c,a===Qb&&(a=ui,b.substr(ui,5)===ae?(c=ae,ui+=5):(c=Qb,0===Ai&&g(be)),c!==Qb&&(vi=a,c=ce()),a=c,a===Qb&&(a=ui,b.substr(ui,4)===de?(c=de,ui+=4):(c=Qb,0===Ai&&g(ee)),c!==Qb&&(vi=a,c=fe()),a=c,a===Qb&&(a=ui,b.substr(ui,9)===ge?(c=ge,ui+=9):(c=Qb,0===Ai&&g(he)),c!==Qb&&(vi=a,c=ie()),a=c,a===Qb&&(a=ui,40===b.charCodeAt(ui)?(c=Ud,ui++):(c=Qb,0===Ai&&g(Vd)),c!==Qb?(d=db(),d!==Qb?(e=w(),e!==Qb?(f=db(),f!==Qb?(41===b.charCodeAt(ui)?(h=Wd,ui++):(h=Qb,0===Ai&&g(Xd)),h!==Qb?(vi=a,c=je(e),a=c):(ui=a,a=Tb)):(ui=a,a=Tb)):(ui=a,a=Tb)):(ui=a,a=Tb)):(ui=a,a=Tb)))))))),a}function J(){var a,c,d,e,f,h;if(Ai++,a=ui,45===b.charCodeAt(ui)?(c=Ld,ui++):(c=Qb,0===Ai&&g(Md)),c===Qb&&(c=kc),c!==Qb)if(d=eb(),d===Qb&&(d=kc),d!==Qb)if(91===b.charCodeAt(ui)?(e=le,ui++):(e=Qb,0===Ai&&g(me)),e!==Qb){if(f=[],h=L(),h!==Qb)for(;h!==Qb;)f.push(h),h=L();else 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a,c,d,e,f;if(a=ui,ye.test(b.charAt(ui))?(c=b.charAt(ui),ui++):(c=Qb,0===Ai&&g(ze)),c!==Qb){for(d=[],Ae.test(b.charAt(ui))?(e=b.charAt(ui),ui++):(e=Qb,0===Ai&&g(Be));e!==Qb;)d.push(e),Ae.test(b.charAt(ui))?(e=b.charAt(ui),ui++):(e=Qb,0===Ai&&g(Be));d!==Qb?(vi=a,c=Ce(c,d),a=c):(ui=a,a=Tb)}else ui=a,a=Tb;if(a===Qb){if(a=ui,c=[],De.test(b.charAt(ui))?(d=b.charAt(ui),ui++):(d=Qb,0===Ai&&g(Ee)),d!==Qb)for(;d!==Qb;)c.push(d),De.test(b.charAt(ui))?(d=b.charAt(ui),ui++):(d=Qb,0===Ai&&g(Ee));else c=Tb;if(c!==Qb)if(ye.test(b.charAt(ui))?(d=b.charAt(ui),ui++):(d=Qb,0===Ai&&g(ze)),d!==Qb){if(e=[],Ae.test(b.charAt(ui))?(f=b.charAt(ui),ui++):(f=Qb,0===Ai&&g(Be)),f!==Qb)for(;f!==Qb;)e.push(f),Ae.test(b.charAt(ui))?(f=b.charAt(ui),ui++):(f=Qb,0===Ai&&g(Be));else e=Tb;e!==Qb?(vi=a,c=Fe(c,d,e),a=c):(ui=a,a=Tb)}else ui=a,a=Tb;else ui=a,a=Tb}return a}function N(){var a,b,c;return a=ui,b=P(),b!==Qb?(c=O(),c!==Qb?(vi=a,b=Ie(b,c),a=b):(ui=a,a=Tb)):(ui=a,a=Tb),a===Qb&&(a=ui,b=P(),b!==Qb&&(vi=a,b=Je(b)),a=b),a}function O(){var a;return 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