Added Library Mappings and VCS Root

These files differ on Windows and OS X.

Global/JetBrains.gitignore

@@ -5,6 +5,8 @@
 .idea/workspace.xml
 .idea/tasks.xml
 .idea/dictionaries
+.idea/vcs.xml
+.idea/jsLibraryMappings.xml
 
 # Sensitive or high-churn files:
 .idea/dataSources.ids