Set up documentation hosting

[fdiblen]

All documentation currently lives in the README.md file. As the project grows (more plugins, more configuration options, tutorials, API docs), a single README won't scale.

Options:

• ReadTheDocs with Sphinx or MkDocs -- free for open source, auto-builds on push
• GitHub Pages with MkDocs -- simple to set up, no external service

[tamasgal]

Working on that!