Give admins the ability to destroy all problems associated with an app
Bump Rails version to 3.2.17

To pick up recent security fixes (CVE-2014-0080, 0081, 0082).
Merge pull request #657 from alphagov/bump_rails

Bump Rails version to 3.2.17
Merge pull request #640 from tony-spataro-rs/app_destroy_all_problems

Give admins the ability to destroy all problems associated with an app