title: Play 2.1 - WS API - Missing Type Param Compile Error - WS.url(...).get().map { r => ... }
body: <p>The error <code>missing parameter type</code> for <code>response</code> is given when I try to compile this code which comes (almost) directly from the <a href="http://www.playframework.com/documentation/2.1.0/ScalaWS" rel="nofollow">Play 2.1 Docs</a></p>
  
  <pre><code>def feedTitle(feedUrl: String) = Action {
    Async {
      WS.url(feedUrl).get().map { response =&gt;
        Ok("test")
      }
    }
  }
  </code></pre>
  
  <p>So then I give it a type like this, <code>{response: WS.Response =&gt; ...}</code> but then I get this error:</p>
  
  <pre><code>type mismatch;
  found : play.libs.WS.Response =&gt; play.api.mvc.SimpleResult[String]
  required: play.libs.F.Function[play.libs.WS.Response,?]
  </code></pre>