item refactor, point and dimension method changes, item is now handling
focus
	modified:   GuiTest/TestGui.cpp
	modified:   README.md
	modified:   StiGame/GuiState.cpp
	modified:   StiGame/Item.cpp
	modified:   StiGame/Item.h
	modified:   StiGame/MDimension.cpp
	modified:   StiGame/MDimension.h
	modified:   StiGame/MPoint.cpp
	modified:   StiGame/MPoint.h
	modified:   StiGame/Rectangle.cpp
	modified:   StiGame/Rectangle.h
	modified:   StiGame/SPhysic.cpp
	modified:   StiGame/StiGame.cbp
	modified:   StiGame/Surface.cpp
	modified:   StiGame/TextBox.cpp
	modified:   StiGame/TextBox.h
	modified:   tools/sprite-editor/gui/main_window.py
	modified:   tools/sprite-editor/gui/main_window.ui
	modified:   tools/sprite-editor/gui/resource_file_widget.py
	modified:   tools/sprite-editor/gui/resource_file_widget.ui
	modified:   tools/sprite-editor/main_window.py
	modified:   tools/sprite-editor/readme.md
	modified:   tools/sprite-editor/resource_file_widget.py