Created WiimoteListener controller class.

Mapped increase/decrease line width to the wiimote's +/- buttons, cycle through colours with the wiimote's LEFT and RIGHT buttons, and the B button disconnects controller.

Note:  the wiimote must be disconnected before exiting the system or else the wiimote will not connect the next time you try to run the system.  If you forget to disconnect before exiting the system you can disconnect the wiimote manually from your computer.