bad fiel removed, BaseGameState modification
preparation for GuiOverlay
	modified:   stigame/BaseGameState.cpp
	modified:   stigame/BaseGameState.h
	deleted:    stigame/include/ViewportArea.h
	deleted:    stigame/src/ViewportArea.cpp
GuiOverlay works
	modified:   stigame/GuiOverlay.cpp
	modified:   stigame/GuiOverlay.h