[WIP] V3 API

:construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: :construction: 

This is no where near done. But I wanted to open up the PR now, so it's development would be visible and there'd be a means for discussion.


* [x] - Get Sinatra app in for API
* [x] - Set up env for testing API
* [x] - Design endpoints
* [ ] - Add hash methods to models so we can dump to JSON
* [ ] - Make the empty endpoints actually do things
* [ ] - Document API