Fixes for the Input feature
	Input class:
	-Removales:
		Unnecessary Interpetrate function,
		The return value from Update.

	-Additions:
		Cursor position and update.

	KeyDefines:
	-Addtions:
		Id for left mouse button, currently unused.

	System:
	-Additions:
		Cursor now locked into the window when it's in focus.