some changes into vf, ActionBinding which inherit from vf, overlaymenu
changes
	modified:   StiGame/ActionBinding.cpp
	modified:   StiGame/ActionBinding.h
	modified:   StiGame/BaseGameState.cpp
	modified:   StiGame/BaseGameState.h
	modified:   StiGame/OverlayGameAction.cpp
	modified:   StiGame/OverlayMenu.cpp
	modified:   StiGame/OverlayMenu.h
	modified:   StiGame/VarFile.cpp
	modified:   StiGame/VarFile.h