Feature/add swagger docs

[Buckwich]

I have added a swagger API documentation which is generated based on the current code. If you like this way of documentation I can add more details to the API (parameters, return values)

[skullydazed]

Heya, thanks for opening this. I keep meaning to look into this deeper but haven't had a chance to yet. I've already been working on some swagger stuff (https://app.swaggerhub.com/apis/QMK/qmk-api/0.2.0) from a different direction, so I need to figure out how your work interacts with mine. :)

I don't have a firm timeline on when that will happen, but I wanted to check in and let you know what's up.