Patch

Added some code for screen transition.
Added a basic mainscreen
Commented some of the codes
	modified:   Makefile
	modified:   game/Game.cpp
	modified:   game/Game.hpp
	modified:   game/f_assetsloading.cpp
	new file:   game/screens/MainScreen.cpp
	new file:   game/screens/MainScreen.hpp
	modified:   game/screens/Screen.hpp
Change make file to read from file instead
update makefile to reflect changes in framework
update to match framwork code
update Makefile