title: Angular 2 Http request does not send credentials
body: <p>I am working with Angular 2 and I am trying to send HTTP request with credentials:</p>
  
  <p>This Angular 1 code works well, it includes the credentials:</p>
  
  <pre><code>$http.get("http://some.com/user",{ withCredentials: true})
  </code></pre>
  
  <p>According to the API preview I have implemented this Angular 2 code but it does not include credentials:</p>
  
  <pre><code>    http.get("http://some.com/user", {
          headers: myHeaders,
          credentials: RequestCredentialsOpts.Include
      }).toRx()
          .map(res =&gt; res.json())
          .subscribe(
          // onNext callback
              data =&gt; this.successHandler(data),
          // onError callback
              err  =&gt; this.failure(err)
      );
  </code></pre>
  
  <p>I am working with Angular 2.0.0-alpha.37.</p>