title: RestSharp JsonDeserializer with special characters in identifiers
body: <p>I have some JSON coming from Last.fm like this:</p>
  
  <pre><code>{
     "toptags":{
        "@attr":{
           "artist":"Whatever",
           "album":"Whatever"
        }
     }
  }
  </code></pre>
  
  <p>Is there a special way to setup RestSharp to get it to recognize the <strong>@attr</strong>? The @ (AT sign) is causing me problems because I can't create an identifier that will match this.</p>