Add/improve documentation site

[Kronuz]

There's now https://mechboxes.github.io/mech/, but it needs documentation.

[jimoquinn]

I clicked the "improve this page" on the site above and I end up with a 404 not found. Specifically on the Boxes page (https://mechboxes.github.io/mech/docs/boxes/). Is there another way we can contribute?

[Kronuz]

You can do pull requests here in the repository, in the gh-Pages branch: https://github.com/mechboxes/mech/tree/gh-pages