Restful Objects spec v0.60

Work continues on the Restful Objects spec, which aims to define a set of RESTful resources, and corresponding
representations, for accessing and manipulating a domain object model.

Recent significant changes include a full description of how to use view models to encapsulate the domain entities while preserving the RESTful HATEOAS principle, and support support for blobs/clobs, in other words media types such as application/pdf, image/jpeg etc.

Feedback always welcome.