Basic RESTful API design

Alex and me just did some API design, thanks to *apiary.io*

Docs are available at [docs.europraporapi.apiary.io](http://docs.europraporapi.apiary.io/), as well as mocked API with enabled CORS at [europraporapi.apiary.io](http://europraporapi.apiary.io/), so we can test it first without even touching the actual code.