Documentation

[hansihe]

There are now a relatively large set of features that I consider stable enough that we could start documenting them properly.

What system should we use for writing the documentation? Should we just do plain .md files, or should we opt for something more advanced?

[roblabla]

I've seen something pop up on the rust reddit that would tie the docs with rustdocs. https://github.com/Geal/cargo-external-doc this is it. It's used by nom, funnily enough.