Text box working, some change on gui::item
	modified:   GuiTest/TestGui.cpp
	modified:   GuiTest/TestGui.h
	modified:   README.md
	modified:   StiGame/GuiState.cpp
	modified:   StiGame/GuiState.h
	modified:   StiGame/Item.cpp
	modified:   StiGame/Item.h
	modified:   StiGame/StiGame.cbp
	modified:   StiGame/Surface.cpp
	modified:   StiGame/TextBox.cpp
	modified:   StiGame/TextBox.h