Merge branch 'twitter-bridge-fixes' into testing

Merge branch 'twitter-bridge-fixes' into testing

* twitter-bridge-fixes:
  Make sure the session token gets output no matter what (whoops)
  Move submit (connect) button to the very bottom
  Move license checkbox to the end of the form
  Don't allow Twitter registration if site is invite only
  Fix reference to constant
  problem with remote subscription on groups in OStatus
  show correct favorites link
  Don't try to verify URL if the user has left it out when making a new event
  Fix undefined variable
  Change time format to work with older PHP (before 5.3)
  move OMB-specific remote login button to OMB Plugin
  use correct redirect on logout of single-user site