Add an Xcode .gitignore

Inspired by http://stackoverflow.com/questions/49478/git-ignore-file-for-xcode-projects

Author: alexcurylo

.gitignore

@@ -0,0 +1,54 @@
+# http://stackoverflow.com/questions/49478/git-ignore-file-for-xcode-projects
+
+# OS X
+#
+.DS_Store
+.Trashes
+*.swp
+*.lock
+
+# Xcode
+#
+*~.nib
+DerivedData/
+build/
+*.pbxuser
+*.mode1v3
+*.mode2v3
+*.perspectivev3
+!default.pbxuser
+!default.mode1v3
+!default.mode2v3
+!default.perspectivev3
+xcuserdata
+*.moved-aside
+*.hmap
+*.ipa
+*.xcuserstate
+# http://stackoverflow.com/questions/18340453/should-xccheckout-files-in-xcode5-be-ignored-under-vcs
+#*.xccheckout
+
+# JetBrains AppCode
+#
+.idea/
+
+# other SCC directories
+#
+.hg
+.svn
+CVS
+
+# 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/
+!Podfile.lock
+
+# Carthage
+#
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+# Carthage/Checkouts
+Carthage/Build