blit update, some network
	new file:   StiGame/PacketBuffer.cpp
	new file:   StiGame/PacketBuffer.h
	modified:   StiGame/Rectangle.cpp
	modified:   StiGame/Rectangle.h
	modified:   StiGame/StiGame.cbp
	modified:   StiGame/Surface.cpp
	modified:   StiGame/Surface.h
	modified:   StiGame/Viewport.cpp