title: Ionic 2: Provide data when setting root page
body: <p>Is there a way to provide data when setting the <code>rootPage</code> in Ionic 2?  I know I can provide data with the <code>NavController</code> like so:</p>
  
  <pre><code>this.navCtrl.push(NewPage, {
      foo: bar
  })
  </code></pre>
  
  <p>but if I want to set a new <code>rootPage</code>, how can I pass data?</p>