title: Cannot resolve toPromise in an angular webservice
body: <p>I am trying to create a very simple angular service:</p>
  
  <pre><code>import { Http, Response } from '@angular/http';
  import 'rxjs/add/operator/toPromise';
  
  export class Webservice {
  
    constructor(private http: Http) {
  
    }
  
    getMessages() {
      return this.http.get('http://localhost:63962/api/someshittyendpoint').toPromise();
    }
  }
  </code></pre>
  
  <p>Whatever I do, I get the following <code>Module not found: Error: Can't resolve 'rxjs/add/operator/toPromise'</code>.</p>
  
  <p>I have installed rxjs-compat and verified that the module actually is on the path. I don't understand what's wrong?</p>
  
  <p>Thanks in advance!</p>