cocoa project update

Signed-off-by: Gabriele Di Bari <dbgabri@gmail.com>
scorch tree errors…
Merge branch 'master' of https://github.com/Gabriele91/Easy2D

Conflicts:
	include/cocoa/CocoaApp.h
	include/cocoa/CocoaInput.h
	include/cocoa/CocoaScreen.h
	src/cocoa/CocoaApp.mm
	src/cocoa/CocoaInput.mm
	src/cocoa/CocoaScreen.mm