Implement real RESTFul api

[claudio-viola]

Decorate controller response following HATEAOS standards. At least: Links { self,next,prev,last,first, relations links .} meta: (method, total count, filters)
data: { relations }

[FredericHeem]

Let's design the API according to an aspiring REST API standard: RAPIS

[FredericHeem]

See https://github.com/FredericHeem/starhackit/pull/102