Multiple bug fixes and tweaks:
  - Allow admins to edit of user's school
  - Fix attendance page that professors can see
  - Allow admins as well as facilitators to access attendance
  - Try to make user counts for conversations more prominent
  - Add title texts to images on conversation index page for increased clarity
  - Add missing </td> tag to a couple of tables
Merge branch 'master' of github.com:TeeYum/winc