Add typed JSON objects

[lyschoening]

Routes or complex models sometimes contain field.Object types that would be useful to load into a specific object type on the client side to attach methods or additional meaning to it.

For instance, the client might want to load each location in the following resource into a Location object:

{
    "$uri": "/business/1",
    # ...
    "locations": [
        {
            "street": "Foo st.",
            "city": "Foo City",
            # ...
        },
        # ...
    ]
}

To make this easy to do, there could be a typed object. It would contain a type hint that would help clients add object hooks for that particular type. If a client would not recognize an object, it could simply parse it as regular JSON. The type hints would be an additional property such as "$type": "location". Each type should have its own definition in the schema, but it wouldn't have any links attached to it.