Fix administrator handling.

Actually use admins table for authentication of reseller and admin.
Save pass as md5 hash (should be bcrypt at some point!)
Display proper user name in view.
Allow searching by login.
Add simple role handling via realm check.
Cleanup unused var.
Cleanup debug dumpers.
Add Administrator site to quick access menu.
Rework Administrator handling.

Use is_superuser as admin indicator.
Only show admins, no resellers (will be handled in another view/ctrl).
Allow updates without reentering password.
Hide internal fields in view.
Set sane default values.
Implement basic reseller CRUD.