title: Angular 2 RC.5 Plunker error: TypeError: core_1.NgModule is not a function
body: <p>I upgraded my Angular 2 Plunker from RC.4 to RC.5 by doing the following:</p>
  
  <ul>
  <li>updated systemjs.config.js to match the <a href="https://angular.io/resources/live-examples/quickstart/ts/plnkr.html" rel="nofollow">quickstart plunker</a></li>
  <li>updated main.ts to match the quickstart plunker</li>
  <li>created file app/app.module.ts, and populated it with what the quickstart plunker has</li>
  </ul>
  
  <p>I don't see any other changes that are required for my simply plunker.</p>
  
  <p>I keep getting this error: <code>Error: TypeError: core_1.NgModule is not a function(…)</code></p>