Merge branch 'offline'

* offline: (22 commits)
  Removing debugging, preparing to deploy offline for testing.
  Adding a great progress bar and story fetch order.
  Fetching all unread stories, ordered by recency.
  Queueing read stories and sending them on feed load or feed list load.
  Marking stories as read in offline mode. Need a read story queue to send when back online.
  Adding order and unread status to offline.
  Adding river to offline. Needs customization.
  Refactored all database calls to be threadsafe and use a new database queue. Dope.
  Connection error handling on tlnb.
  Got messaigng for offline down pat. Now needs story actions queue.
  Correctly showing notifiers for offline and slow loads.
  Fixing animation bug when not on story list view.
  Far better loading indicator on story list in ios.
  Showing loading notifier. Still need to bring back first page loading notifier.
  Fixing up notifier to actually show loading.
  Fading and positioning of notifier.
  Adding NBNotifier, but I just want to rip it out.
  A bit crude, but now storing feed stories offline.
  Adding fmdb.
  Ripping out CoreData. Using SQLite directly.
  ...
Fixing default menu for river/folder read filter.
Upgrading to iOS 6 as a minimum requirement. Still need to fix dependencies.