Update .gitignore

.gitignore

@@ -1,6 +1,6 @@
 # Xcode
-#
 build/
+.build/
 *.pbxuser
 !default.pbxuser
 *.mode1v3
@@ -18,16 +18,16 @@ DerivedData
 *.xcuserstate
 
 # CocoaPods
-#
-# We recommend against adding the Pods directory to your .gitignore. However
-# you should judge for yourself, the pros and cons are mentioned at:
-# http://guides.cocoapods.org/using/using-cocoapods.html#should-i-ignore-the-pods-directory-in-source-control
-#
 Pods/
 
-###
-._*
+# Carthage
+Carthage/Build
 
+# Mercurial
 .hgignore
 
+# MacOS
 .DS_Store
+
+# Other
+._*