CC-5640: End time does not get updated when editing the current playing show

Was checking if the start time was in the past, but we should check if the
end time is in the past. This way you can extend or shrink shows that are currently playing.
CC-5619 : Browser caching can produce unexpected behaviour in the 'Listen Now' window.

upgrading to jPlayer 2.5.0
Merge branch '2.5.x' of github.com:sourcefabric/Airtime into 2.5.x
Workaround for PHP APC bug affecting Ubuntu 12.04
Rollback to requiring PHP 5.3 to fix Ubuntu 12.04 support
CC-5648: Events are shifted down in the month view

* Fixed it.
CC-5649: Remove unused function, Application_Model_Show::populateAllShowsInRange
SAAS-374 Don't expose API key when a component has failed