An admin can mark and unmark users as RMs or RAs

* Implement namespace routing to have admin functions
* Admin controller to ensure a user is an admin
* Admin directory (controller/views) to house the admin functions
* Add custom validation in User model
@carlosramireziii I think I remember @halogenandtoast say something like that being another way to solve the problem, when I had a chat with him 2 days ago. But I'm not entirely sure... I'd be interested to know too. 

Meanwhile, I can merge to masters... right?