Fixes #15: Added missing forward implementation for methodSignatureForSelector: in MRWeakProxy
Fixes #15: Added missing forward implementation for methodSignatureForSelector: in MRWeakProxy

jackywpy/MRProgress,boherna/MRProgress,hanangellove/MRProgress,hanangellove/MRProgress,yungfan/MRProgress,colemancda/MRProgress,mrackwitz/MRProgress,yarry/MRProgress,zaubara/MRProgress,AlexanderMazaletskiy/MRProgress,yarry/MRProgress,odyth/MRProgress,jackywpy/MRProgress,AlexanderMazaletskiy/MRProgress,boherna/MRProgress,AddAloner/MRProgress,zaubara/MRProgress,yungfan/MRProgress,AddAloner/MRProgress,mrackwitz/MRProgress,odyth/MRProgress,zaubara/MRProgress,colemancda/MRProgress