Got events all set up. Can now be polled using pollEvents() in the game
class.

Signed-off-by: Caleb Cassady <psychotix@hotmail.com>
Added the basics of the gui class.

Signed-off-by: Caleb Cassady <psychotix@hotmail.com>
Added basic gui window class.

Signed-off-by: Caleb Cassady <psychotix@hotmail.com>