title: Property 'catch' does not exist on type 'Observable<any>'
body: <p>On the Angular 2 documentation page for using the Http service, there is an example.</p>
  
  <pre><code>getHeroes (): Observable&lt;Stuff[]&gt; {
    return this.http.get(this.url)
                    .map(this.extractData)
                    .catch(this.handleError);
  }
  </code></pre>
  
  <p>I cloned the <a href="https://github.com/AngularClass/angular2-webpack-starter" rel="noreferrer">angular2-webpack-starter</a> project and added the above code myself. </p>
  
  <p>I imported <code>Observable</code> using </p>
  
  <pre><code>import {Observable} from 'rxjs/Observable';
  </code></pre>
  
  <p>I'm assuming the properties <code>Observable</code> are imported as well (<code>.map</code> works).  Looked at the changelog for rxjs.beta-6 and nothing is mentioned about <code>catch</code>.  </p>