Angular 2 Loading Bar

Based on https://github.com/chieffancypants/angular-loading-bar and idea from (@rodrigouroz) https://github.com/rodrigouroz [source from https://github.com/angular/angular/issues/2684]

Requirements: Angular 2.0.0-beta.1+

1. include the loading bar as a dependency for your app.

   bootstrap(AppComponent, [ LoadingBar.HTTP_PROVIDERS ]);

2. render tag loading-bar int your root component (and set directive LoadingBar to component directives)

   <loading-bar></loading-bar>

3. That's it -- you're done!