bb gh deploy <pr>



Pull request for [bb gh deploy <pr>](https://trello.com/c/BBW80XRi/1898-bb-gh-deploy-pr).

    
FWIW, these two lines is exactly what `res.raise_for_status()` does - see [docs](http://docs.python-requests.org/en/latest/api/#requests.Response.raise_for_status)