title: rxjs: Observable.of(...).delay is not a function
body: <p>I would like to create a delayed observable in typescript by:</p>
  
  <pre><code>import 'rxjs/add/observable/of';
  
  ...
  
  const o = Observable.of(values).delay(10000);
  o.subscribe((v) =&gt; { alert(v); });
  </code></pre>
  
  <p>but I got the following error: </p>
  
  <pre><code>"Observable_1.Observable.of(...).delay is not a function"
  </code></pre>