Added audio support.
Added add and remove entity.
Documented Entity a bit more.
Added licence and copyright notices!
Fixed copyright notices.
Removed trailing whitespace.
Added full stop.
Fixed vera complaints in Audio.
vera-ified graphics.
Vera-d System.
Vera-d utility.
Fixed stupid error.
Merge branch 'master' into nonQtEvents

Conflicts:
	CMakeLists.txt
	Graphics/Animation.cpp
	Graphics/Animation.hpp
	Graphics/IRender.cpp
	Graphics/IRender.hpp
	Graphics/PCRender.cpp
	Graphics/PCRender.hpp
	Graphics/Text.cpp
	Graphics/Texture.hpp
	System/Entity.cpp
	System/Entity.hpp
	System/Game.cpp
	System/Game.hpp
	System/State.hpp
	System/Window.cpp
	System/Window.hpp
	Utility/Vector.hpp
License added to event handler.