Automatically deploy from master (or another branch)

[davidfischer]

I would like to manage the deployment automatically. Whether that goes through a Heroku pipeline or a CI service like TravisCI isn't as important. I just want the site to get deployed from the latest master (or maybe another branch like release).

Given our current setup (see #111), there would be two parts to this although they aren't equally important.

• Firstly, we could have TravisCI write to the gh-pages branch (which github pages uses). This would solve the vast majority of the deployment headaches.
• Secondly, we could have pushing to master (or another branch) on https://github.com/pythonsd/pythonsd-django release that to Heroku