Stop raising exceptions if there are no users accessible
Delete users through CMS admin

Fix Trello card no. 1262
Refactoring users_controller
Site content is visible only to super admins
Update gems, add spring for faster testing.
Load admin site in users_controller

Should fix Trello card no. 1432
Handle RecordNotFound and attempt to fix the test for destroying users
Admin deleting users: Fix test, remove spurious rescue
Tidy up all these tests, CanCan, etc.
Add support for supplying a block to admin_route_redirect
Update paperclip version dependency
Fix redirect loop. Users can edit sites, sometimes.
making admin site loader not redirect to sites/new if there are no sites, because this conflicts with possible cancan abilities and creates infinite redirects. better to just leave the user on the sites list, even if they cant do anything there
making the site index redirect conditional on cancan ability
Merge branch 'master' into inline_editing
Removed no longer used parameters