Deractivating premiums.
Merge branch 'master' of github.com:samuelclay/NewsBlur

* 'master' of github.com:samuelclay/NewsBlur:
  Adding a lock for the intelligence slider for focus stories. If the user selects focus and there are actually focus stories, lock it for the future when there are no unread focus stories.
  Uppiung the find next unread story titles page limit from 12 to 50.
  Hiding folders with no unread stories in Unread/Focus mode.
  Adding autocomplete to emailing a story dialog.
  Using queue for scheduling feed fetches on load.
  Renaming celerybeat supervisor task.