Renamed InputManagerCocoa.cpp to .mm as it contains Objective-C code
Added getAmbientLight to LightingUserAPI
Added window setting windowParams["macAPICocoaUseNSView"] = "cocoa"; for Cocoa view based application to be consistent (as it it inside a view, not a full window in this case.
Warning removed in Object3D when the material passed is ""… now it is not assigned.
Fix: addResourceLocation for os x