title: How to check Angular2 version with typescript
body: <p>I have written a simple app with angular2@2.0.0-alpha.11, and it works great. Now that I am testing it with the latest version of the alpha and beta avaible on npm, and I keep wondering if I really really changed or I am caching something.</p>
  
  <p>I want to do something like the below on my root component</p>
  
  <pre><code>export class ChromeComponent {
  
    ngOnInit() {
      console.log('angular version');
    }
  }
  </code></pre>
  
  <p><code>angular.version</code> on the console return <code>undefined</code></p>