Refactored ObjCMemberPlugin.copyAnnotations() method and moved it to Annotations. Added test for Annotations which tests copyParameterAnnotations() so far.
Fixed bugs in ObjCMemberPlugin regarding copying of parameter annotations and proper shift.
Fixed bug in ObjCMemberPlugin which caused the wrong selector name to be generated for extension methods. (#276)
Allow an ObjC method to be overridden using a different signature. (#323)