Update libv8 (old version is causing problems on OS X 10.10)
Confirm message for deleting activities with learner data.[#83765524]

 - Add confirm message to delete an activity,activity pages,
page elements
Use AWS snapshot server:  [#83890728]

https://www.pivotaltracker.com/story/show/83890728
Simple ImageProxy works with protocol relative urls [#83890764]

https://www.pivotaltracker.com/story/show/83890764