title: deleting user from django, but preserving CMS pages
body: <p>If you delete a user from Django, then all related CMS-pages will be removed as well. E.g. when someone leaves the company, I don't want his credentials available in the system, so deleting a user is the best option (only disabling the account is a bit of hassle if you have many users).
  The pages being deleted as well when removing a user, is an undesired feature. Is there a (simple) way to work around this</p>