title: Returning a string containing valid Json with Nancy
body: <p>I receive a string that contains valid JSON from another service.
  I would like to just forward this string with Nancy but also set the content-type to "application/json" which will allow me to remove the need for using $.parseJSON(data) on the client side.</p>
  
  <p>If I use Response.AsJson it seems to mangle the JSON in the string and adds escape characters.
  I could create a Stream with the string and set the response type something like:</p>
  
  <pre><code>Response test = new Response();
  test.ContentType = "application/json";
  test.Contents = new MemoryStream(Encoding.UTF8.GetBytes(myJsonString)); 
  </code></pre>
  
  <p>but would like to know if there is a simpler way? </p>