angular-ui/ui-calendar — pull request #171 by envyN (2014-10-24 17:20:51+00:00)
Title: Fixed event '_id' assignment.

Fixed event '_id' attribute assignment..
Events with same 'id' required for repeat functionality were being assigned different '_id' earlier.
This resulted in breaking functionality for fullcalendar's repeat event functionality wherein repeated events repositioning is supposed to reposition all events by the same day-difference-delta.