JSON-API Support

Currently the following JSON-API objects are being represented in the generated RAML Documentation:

- [ ] [Links](http://jsonapi.org/format/#document-links)
- [x] [Source](http://jsonapi.org/format/#error-objects)
- [x] [Top Level Includes](http://jsonapi.org/format/#fetching-includes)
- [x] [Resource Object](http://jsonapi.org/format/#document-resource-objects)