Developer guide

• Setup describes how to set up a development environment for hacking on Doxyte.

• Overview describes how Doxyte works at a high level.

• Design notes is a brain dump from a while ago of what I want from a full-fledged documentation generator.

  The design of Doxyte has ended up much simpler, largely by deciding to only target HTML output. We could still in future provide standalone/offline output documents in EPUB format [#6], since EPUB is basically a zipped-up website.

• Benchmarks is just a demonstration of including a data visualisation using the Vega-Lite charting library.