OverlayFrame, namespace refactor for ValueObject and SelectionEvent*
StringRenderer
	new file:   stigame/OverlayFrame.cpp
	new file:   stigame/OverlayFrame.h
	modified:   stigame/OverlayMenu.h
	modified:   stigame/ResourceFile.cpp
	modified:   stigame/ResourceFile.h
	modified:   stigame/SFont.cpp
	modified:   stigame/SFont.h
	modified:   stigame/SelectionEventArgs.cpp
	modified:   stigame/SelectionEventArgs.h
	modified:   stigame/SelectionEventListener.cpp
	modified:   stigame/SelectionEventListener.h
	modified:   stigame/SelectionEventThrower.cpp
	modified:   stigame/SelectionEventThrower.h
	modified:   stigame/StiGame.cbp
	new file:   stigame/StringRenderer.cpp
	new file:   stigame/StringRenderer.h
	modified:   stigame/Surface.cpp
	modified:   stigame/Surface.h
	modified:   stigame/ValueObject.cpp
	modified:   stigame/ValueObject.h