Revert 825952e..b44b15c

This rolls back to commit 825952ee404fab6942c34291c7e714f0697d6511.
client example finally working

NSFetchedResultsController works fine. [self.context
processPendingChanges] is need for it to work. The reason it didn’t add
inserted objects before was because I never set the Post’s self.creator
value to the user.