Drag zone demo with Tobii functionality

	There is a new demo. It displays a drum and drumstick. You pick up the drumstick by looking at it, and bang it against the drum to make a somewhat drum-like noise.
	This demo should work with a Tobii, though it has only been tested with the tobiisim for now.
	There is also some new code in the event handler to handle drag zone reporting.

	huzzah!