Adding mongodb configsvr and mongos init and config scripts. Preparing for sharding.
Moving mongo shard server.
Double number of free accounts.
Fixing read preference on feed fetch history.
One more read_preference switch.
Merge pull request #276 from ojiikun/master

Android: More Redesign Cleanup
Fixing small bug in autocomplete for client apps when the feed doesn't exist.
Adding login as menu item for admin users on ios for debugging.
Upgrading MMS agent from 1.5.6 to 1.5.7.
Fix margins on unread-dots in story list (#281).