code: function didSwipeBackToCancel() {
              var cancelled = false;
      		if(options.cancelThreshold !== null && direction !==null)  {
      		    cancelled =  (getMaxDistance( direction ) - distance) >= options.cancelThreshold;
  			}
  			
  			return cancelled;
  		}
docs: Checks the user has swiped back to cancel.
  @return Boolean if <code>cancelThreshold</code> has been set, return true if the cancelThreshold was met, else false.
  If no cancelThreshold was set, then we return true.
  @inner