removeEvents by _id stop to work in rev v3.5.0 and v3.5.1

Fullcalendar after revs v3.5.0 and v3.5.1 stop to work removeEvents by _id.

$('#calendar').fullCalendar('removeEvents', event._id);

Used for new events using Drag and Drop and itens still dont have id then in old version we use auto id (_id) to remove temp events.

[arshaw]

oh geez, thanks for letting me know @luto

[helphop]

Also with recurring events, when I try to do

 $('#calendar').fullCalendar('removeEvents', function(searchEvent) {
	return searchEvent._id === findEvent._id;
});

it deletes all of the events even though event._id is unique for each event.