@dzucconi: Run migration script in cron & add New Relic

This uses [node-cron](https://github.com/ncb000gt/node-cron) to run the migration script twice a day. Node cron is a pretty neat way to [avoid the Heroku Scheduler](http://productbuilder.wordpress.com/2013/09/05/using-node-cronjobs-to-replace-heroku-worker-dynos/) (which I can vouch for using in a [side project](http://nofeedigs.com) before). I'm also giving NewRelic another shot here for a monitoring tool... we'll see how it goes.