Feature/user management angular

This covers user management functionality for the settings page.
 - add/delete user functionality
 - reset password functionality

Ended up figuring out why the ui-utils password validation was not working so I didn't have to create a new directive.

There aren't any tests here since there really isn't any complicated logic in the controller or anything, just basic CRUD functionality on the service. @CloudNiner and I tried to come up with some ideas for things to test on Friday, but couldn't think of anything. If someone has an idea for a test I'd be happy to write one.