Change documentation to docma

[markhalliwell]

https://github.com/onury/docma

Currently, the documentation (while fantastic) has a ton of overhead and dependencies to actually get it working properly.

Furthermore, it modifies the README.md file ever single time there's a change. It would be better if we could have a "one solution for all" type of deal and docma seems to fit that.

It's not perfect, but it hits everything we're currently doing and then more.