Clean project structure (#320)

.gitignore

@@ -1,10 +1,42 @@
-node_modules/**/*
-RCTVideo.xcodeproj/xcuserdata/**/*
-RCTVideo.xcodeproj/project.xcworkspace/**/*
-Examples/VideoPlayer/node_modules/**/*
-Examples/VideoPlayer/VideoPlayer.xcodeproj/project.xcworkspace/**/*
-Examples/VideoPlayer/VideoPlayer.xcodeproj/xcuserdata/**/*
-npm-debug.log
+# OSX
+#
 .DS_Store
+
+# Xcode
+#
 build/
-.gradle/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+*.xccheckout
+*.moved-aside
+DerivedData
+*.hmap
+*.ipa
+*.xcuserstate
+project.xcworkspace
+
+# Android/IJ
+#
+*.iml
+.idea
+.gradle
+local.properties
+*.hprof
+
+# node.js
+#
+node_modules/
+npm-debug.log
+
+# BUCK
+buck-out/
+\.buckd/
+android/app/libs
+android/keystores/debug.keystore