Wrap parsed data which maintains backwards compatibility for apis that r...

...eturn individual resources as one element arrays

Per json api spec, an *"individual resource SHOULD be represented as a single 'resource object'"*, not a one-element array. From their documentation

```
{
  "posts": {
    "id": "1",
    // ... attributes of this post
  }
}
```

this change maintains backwards compatibility, but updates specs and documentation to espouse the recommended specification.