Remove "free"
Change /users/manage to /admin/users/index
Remove unused 'view' view
Remove unused view
Change /users/edit to /admin/users/edit
Change /users/delete to /admin/users/delete
Route /admin/users/edit and /admin/users/delete
Add 'add user' button
Rearrange links
Set up search link in /admin/users
Fix error with search form
Fix error with $search_url
Implement search functionality in /admin/users

I realized it was way more efficient to do this inside the existing
action instead of in a new /admin/users/search action.
Add _isUnique()
Add User.email _isUnique() validation
Add comments to _isUnique()
Adapt _isUnique() to the use of pseudo-field User.new_email
Add 'unclaimed' validation to User.new_email
Move validation from controller to User model
Only show the testimonial form to staffers and attending students