add ability to create admin users, and enable restricted access to an admin area
initial admin area facetview deployment
change navigation ordering and introduce admin link
add admin data to admin search result display
move old delete semantics over to deactivate semantics
implement admin-only delete functionality: addition of delete/undelete buttons to advert pages, deleted status in admin searches, deleted facet in admin area, and display of deleted items on user's account page
security model for advert view/edit pages for various states of deactivate/delete