title: How to add token header in every angular2 router navigate
body: <p>I user angular2 rc.3 、router-3.0.0-alpha.8 and OAuth2 ,</p>
  
  <p>I use OAuth2 ,so after logged in ,How to angular2 front carry token header to navigate other component each time</p>
  
  <pre><code>const APP_ROUTES:RouterConfig = [
     {path: '', component: HomeComponent},
     {path: 'admin', component: AdminComponent},
     {path: 'user', component: UserComponent}
  
  ];
  </code></pre>
  
  <p>e.g. when i want to navigate to the protected  <strong>'admin'</strong> page , using <strong>this.router.navigate(['/admin']);</strong></p>