Build just one message when tweet is sent.

Asynchronous calls to the Campfire/whatever API may result in messages which are out of order:

![screen shot 2014-03-01 at 3 49 41 pm](https://f.cloud.github.com/assets/237985/2302535/0ac3fdca-a183-11e3-9d35-14ef7c370d95.png)