[Examples](http://jsonapi.org/implementations/#examples) has a very nice reference to http://restpack-serializer-sample.herokuapp.com/ but examples are out of date... It seems that it's not only examples, it seems that [RestPack::Serializer](https://github.com/RestPack/restpack_serializer) is not being mantained also... Being JSON API almost being release as 1.0, shouldn't [implementations](http://jsonapi.org/implementations) listed be at least 'still alive' ?