Summary:
`NativeExceptionsManager.js` contains the JS spec for this native module. This diff moves the objc code to CoreModules (since it's the only directory that supports TM at the moment) and makes it conform to the spec.
NOTE: I will update podfiles after this diff is reviewed, before I land. Adding those generated changes makes it really hard to review.
Reviewed By: RSNara
Differential Revision: D16812212
fbshipit-source-id: 38b6e9a20ce15e7e9995df34493b37ed7adb2911