Fixed admin organization users page.

https://www.pivotaltracker.com/story/show/46570475
Upgraded to Rails 3.2.13.

Also had to upgrade Mocha to eliminate test errors, and change how we
load Mocha to avoid deprecation warnings.

https://www.pivotaltracker.com/story/show/46553079
Merge branch 'develop'

Rails security update, fixed admin organization users page.