anchor.diff:  
   ==== Dynamic toolbar title
   
  -We add the `title` property to the `AppComponent` and bind it to the text content of `<div class="title"></div>` inside the toolbar in the template.
  +We add the `title` property to the `AppComponent` and bind it to the text content of `<div title spacer></div>` inside the toolbar in the template.
   
   Instead of a static title, the title is now updated dynamically. We subscribe to the `Router` in `AppComponent` and use `RouteData` in the navigation event callback to get the title value specified for the current route. Each time after user opens the application or navigates inside, the `Router` event is dispatched so the `title` property is updated.
   
   ==== The back icon in the toolbar
   
  -We add `<paper-icon-button>` to have a back icon inside the `<paper-toolbar>` in the template. The icon has a click event binding, which calls `goBack()` method of `AppComponent`. In the method, we invoke `navigate` method of the router to navigate back to the heroes list from the hero detail.
  +We add `<paper-icon-button>` to have a back icon inside the `<app-toolbar>` in the template. The icon has a click event binding, which calls `goBack()` method of `AppComponent`. In the method, we invoke `navigate` method of the router to navigate back to the heroes list from the hero detail.
   
   When the heroes list is shown, the back icon is useless, so we need to hide it. To achieve that, we added `isInChildView` property to `AppComponent`, which is updated from the route data in the navigation event callback. In the template we add `*ngIf="isInChildView"` for the `<paper-icon-button>`.
   
  -We also add a few style rules for the `paper-icon-button` and `.title` to have a nice alignment for them.
  +We also add a few positioning style rules for the `paper-icon-button`.
   
   ==== Dynamic toolbar shadow
   
  -To make the toolbar look better, we make the application toolbar to have a shadow that is shown only for the hero detail view, but not for the heroes list view. For this purpose we bind the `raised` class of the `<paper-toolbar>` to `isInChildView` property and add a style rule which applies the shadow mixin from `paper-styles` to the `<paper-toolbar>` when it has the `raised` class.
  +To make the toolbar look better, we make the application toolbar to have a shadow that is shown only for the hero detail view, but not for the heroes list view. For this purpose we bind the `raised` class of the `<app-toolbar>` to `isInChildView` property and add a style rule which applies the shadow mixin from `paper-styles` to the `<app-toolbar>` when it has the `raised` class.
   
   === Navigation from list to detail
   
  
positive.code: @Component({
    selector: 'my-app',
    template: `
      <paper-scroll-header-panel fixed>
        <paper-toolbar>
          <div class="title">All heroes</div>
        </paper-toolbar>
        <div>My application content</div>
      </paper-scroll-header-panel>
    `,
    styles: [`
      paper-scroll-header-panel {
        height: 100%;
      }
  
      paper-toolbar .title {
        margin-left: 56px;
      }
    `],
    directives: [
      PolymerElement('paper-scroll-header-panel'),
      PolymerElement('paper-toolbar')
    ]
  })
  export class AppComponent { }
  
negative.code: iron-meta
  iron-overlay-behavior
  iron-resizable-behavior
  iron-scroll-target-behavior
  iron-selector
  iron-validatable-behavior
  neon-animation
  