Initial commit
Features:
-Can create GestureReaders and add them to controllers as Listeners.
-Can be used manually to integrate in game loops, etc.
-Can process Leap Motion Gestures.
-Can set a delay between which two gestures of the same type will not be
registered.
-Can disable the delay.
-Can add GestureListeners.
-All gestures will send a "gesturePerformed" event to all
GestureListeners.
-Circle gestures will send "circleStarted" and "circleStopped" events to
all GestureListeners.