Receiver response should never be transformed by diazo.

The response could look like this.

```html
<!DOCTYPE html> (message: <html xmlns="http://www.w3.org/1999/xhtml"><body>
<p>ObjectUpdatedState
None
</p></body></html>
```

But the sender expexts a reponse wothout doctype, etc...

@jone @lukasgraf