Merge branch 'offline_read_cache' into development
Add methods for returning managed objects or ids, dates are now converted to ms to match server-created dates.
Update some internal method names, edits to concurrency interface and documentation.
Update createUserWithFacebookToken method to use POST
Edit postFacebookUpdate method to POST
Edit self.managedObjectContext method for updates
Merge branch 'development' into offline_read_cache
Starting cache w/ expand depth implementation