allow serialization of embedded raw json

[csantero]

closes #34

I took the opportunity to clean up that serializer integration test fixture file. The minification is now done inside the test, so if we need to modify the file, we won't go insane.

I also moved the minification utility into JSONAPI proper. The json sent from the client will now be minified during deserialization, before it reaches the ApiController. I could have gone either way on this one, but I felt that the format of the JSON during transit is no concern of the business layer. If it wants its JSON formatted in a certain way, it can deal with that itself after we are done with it.

[SphtKr]

Will merge, but yeah, I'm not sure if the minification is our job--seems like if the user is doing something this "raw" it should be their job, or leave it to Json.NET (which probably wouldn't do anything to it, I don't think). On the other hand, I wonder if we shouldn't find some way to validate the (outgoing) JSON--if the JSON pulled from the persistence layer is malformed, the whole payload will be unparsable. That could even be an attack vector...though that might be paranoia.