[ReactNative] Move module info from bridge to RCTModuleData

Summary:
@public

The info about bridge modules (such as id, name, queue, methods...) was spread
across arrays & dictionaries on the bridge, move it into a specific class.

It also removes a lot of information that was statically cached, and now have
the same lifecycle of the bridge.

Also moved RCTModuleMethod, RCTFrameUpdate and RCTBatchedBridge into it's own
files, for organization sake.

NOTE: This diff seems huge, but most of it was just moving code :)

Test Plan:
Tested UIExplorer & UIExplorer tests, Catalyst, MAdMan and Groups. Everything
looks fine.

React/Base/RCTBridgeModule.h

@@ -78,7 +78,7 @@ extern dispatch_queue_t RCTJSThread;
  * and the bridge will populate the methodQueue property for you automatically
  * when it initializes the module.
  */
-@property (nonatomic, weak, readonly) dispatch_queue_t methodQueue;
+@property (nonatomic, strong, readonly) dispatch_queue_t methodQueue;
 
 /**
  * Place this macro in your class implementation to automatically register