Refactor for SPoint->Point
GuiOverlay for BaseGameState
	modified:   stigame/BaseGameState.cpp
	modified:   stigame/BaseGameState.h
	modified:   stigame/GuiButton.cpp
	modified:   stigame/GuiButton.h
	modified:   stigame/GuiCheckBox.cpp
	modified:   stigame/GuiCheckBox.h
	modified:   stigame/GuiComboBox.cpp
	modified:   stigame/GuiComboBox.h
	modified:   stigame/GuiImageButton.cpp
	modified:   stigame/GuiImageButton.h
	modified:   stigame/GuiItem.cpp
	modified:   stigame/GuiItem.h
	modified:   stigame/GuiKeyBind.cpp
	modified:   stigame/GuiKeyBind.h
	new file:   stigame/GuiOverlay.cpp
	new file:   stigame/GuiOverlay.h
	modified:   stigame/GuiRadioButton.cpp
	modified:   stigame/GuiRadioButton.h
	modified:   stigame/GuiState.cpp
	modified:   stigame/ISprite.cpp
	modified:   stigame/ISprite.h
	modified:   stigame/MPoint.cpp
	modified:   stigame/MPoint.h
	modified:   stigame/MathTK.cpp
	modified:   stigame/MathTK.h
	modified:   stigame/MultiRect.cpp
	modified:   stigame/MultiRect.h
	new file:   stigame/Point.cpp
	renamed:    stigame/SPoint.h -> stigame/Point.h
	modified:   stigame/SPhysic.cpp
	modified:   stigame/SPhysic.h
	deleted:    stigame/SPoint.cpp
	modified:   stigame/SRect.cpp
	modified:   stigame/SRect.h
	modified:   stigame/Sprite.h
	modified:   stigame/StiGame.cbp
	modified:   stigame/Surface.cpp
	modified:   stigame/Surface.h
	modified:   stigame/Viewport.cpp
	modified:   stigame/Viewport.h
	modified:   stigame/ViewportArea.cpp
	modified:   stigame/ViewportArea.h
	modified:   stiuniverse/MainState.cpp