Deans can promote/demote trustees in their chapter to dean. Closes #51
Rename the can_remove_users? method to can_manage_users? to better reflect what it does
Merge branch 'deans_promoting_deans'

* deans_promoting_deans:
  Rename the can_remove_users? method to can_manage_users? to better reflect what it does
  Deans can promote/demote trustees in their chapter to dean. Closes #51