new branch to fix event_occurences bug. Pivotal #:76544670

new branch to fix event_occurences bug.
Pivotal #:76544670
repeating event schedule is not respecting end time limit (event.repeat_ends_on)
Fixes repeating event repeat_ends_on bug by modifying the next_occurrences function to only accept scheduled event instances before that datetime.
you can use hangout factory here: hangout = FactoryGirl(:hangout, event: @event, updated: '2014-06-17 10:25:00 UTC')