Use a promise to access $rootScope.me

- use a promise to access $rootScope.me. Avoids redundant fetches of me. And cleans up me update handling..
- optimization - we can check if the user is an organizer of an organization by looking at the me object. No query is required.
- bug: ui was incorrectly displaying users as organizers even though they were not
  organizers. The organizers json api was not being used correctly.
  Json api for orgs a user belongs to has also been updated.
- bug: bootstrap test memberships were semi-bogus. Made them more accurate.