side loaded resources not supported

[tbarbugli]

eg.

{
  items:[{}],
  users:[{}]
}

[jerel]

I'm thinking that this should be an opt-in class property on the view. Instead of setting resource_name to a string to set the root key the developer could set it to a boolean False and the renderer would then pass the data through unmodified. Sound good? Want to do a pull request? :)