Merge branch 'master', remote-tracking branch 'remotes/upstream/master'

* remotes/upstream/master:
  package update
  FEATURE: AppID/Secret can now be entered on the plugin's admin page. BUG: if a connected FB-App is deleted and a new FB-App is connected, the app_access_token of the former App remained in the config and made it impossible to activate Real-Time Updates with the new App. USABILITY: Now the user's connector settings page automatically recognizes if the connection is still valid and acts accordingly. SECURITY: XSRF-Protection.
  pass IRC channel through url, allows simpler default choice.
  package update
  remove frown - no longer needed
  Show the pseudo-user Administrator instead of a broken image
  fixed a typo
  Provide a link to reactivate Real-Time Updated
  Another proposal for notifications after FB-Connection-Invalidation

* master: