Documentation build and deployment

[dkfellows]

It's a very good idea to have your primary branch's documentation automatically built and deployed to an (internal?) site. It's not a huge amount of work to set up, yet it helps your whole software project feel ever so much more professionally done. You're already part of the way there with Doxygen.

You need to fix #6 and #12 first before we can really help much with this, and some parts of it require alterations to your project's settings (to enable publication of a documentation tree). You'll probably want to call us back on this once you've resolved the preceding issues.