fixed mistake in getGui()
Add the version number (PS: v0.3 is coming xD)
resolve#1 !

Add setNormalRect() to Gui
Add setHoverRect() to Bouton
Add setSelectRect() to CheckBox & Radio
resolve#2 !

Add selectedOnEvent(sf::Event event) into Input
This function do the textEntered Event and the BackSpace.
The Return key stay in the main