Support reading inline data with schema

[peterdesmet]

read_resource() supports reading from inline data, but that feature is currently marked as experimental because it completely ignores schema. Would be good to support schema, but likely involves a hefty rewrite of read_resource().

[peterdesmet]

Note also that the specs state:

EITHER: a JSON array or Object- the data is then assumed to be JSON data and SHOULD be processed as such OR: a JSON string - in this case the format or mediatype properties MUST be provided.

Thus, a consumer of resource object MAY assume if no format or mediatype property is provided that the data is JSON and attempt to process it as such.