Tests

[wwbrannon]

Need unit / integration tests. Probably we should prefer integration to unit - it's hard to imagine how to unit-test some of the parts here without a really elaborate testing harness including a fake Twitter API.

Speaking of which: how to rig up the testing environment? Travis can provide mysql and postgres, sqlite is always available, but access to the Twitter API is the sticking point. Maybe make some creds for testing purposes? See what tweepy does?