User management

What needs to be done

- [x] Table of users
- [x] Adding new user thru admin ui
- [x] Editing users
- [x] Deleting users
- [x] Making user full member
- [x] Actual login and security
- [x] Expiration targeting
- [x] User search
- [x] Email + Send out the upgrade email
- [x] Tests, duh