Singly/hallway — pull request #761 by kristjan (2013-01-17 00:09:00+00:00)
Title: Sandbox Foursquare synclets

This was unnervingly easy; The synclets store pretty minimal state and don't
share anything, so adding the sandbox config to `synclets.json` just worked.

Waiting 'til tomorrow morning to deploy just in case, so everyone's around and
maybe @smurthas will have a minute to review.

cc @dizzyd