private void onStopTrackingTouch() {
		if (mOnSeekArcChangeListener != null) {
			mOnSeekArcChangeListener.onStopTrackingTouch(this);
		}
	}
Notification that the user has finished a touch gesture. Clients may
want to use this to re-enable advancing the seekarc.

@param seekArc
           The SeekArc in which the touch gesture began
SeekArc_library/src/com/triggertrap/seekarc/SeekArc.java