anchor.diff:  [NOTE]
   .app-layout Elements are Design-Agnostic
   ====
  -Polymer elements from [elementname]#app-layout# set, including [elementname]#app-toolbar# that we use, are design-agnostic. They do not enforce have Material Design look by default. Therefore we need to adjust [elementname]#app-toolbar# styles a bit.
  -
  -Therefore we added color rules for the [elementname]#app-toolbar# in the styles of the [classname]#AppComponent#. We reuse the color values of default theme from [elementname]#paper-styles#.
  +Polymer elements from [elementname]#app-layout# set, including [elementname]#app-toolbar# that we use, are design-agnostic. They do not have Material Design look by default. We need to adjust [elementname]#app-toolbar# styles a bit.
  +
  +Therefore we added color rules for the [elementname]#app-toolbar# in the styles of the [classname]#AppComponent#. Here we reuse the color values of default theme from [elementname]#paper-styles#.
   
   Apart from the colors, it inherits the font family declared for the body. We have already decleared our font settings for the body in [filename]#index.html# earliear during this step.
   ====
  
positive.code: ====
  It is ususally a good practice to exclude external dependencies from your source control. Angular 2 QuickStart source code already contains a [filename]#.gitignore# file, which excludes [filename]#node_modules# directory with npm dependencies from git repository of your application.
  
  Please add the following line to the [filename]#.gitignore# file to also prevent bower dependencies from being tracked by your source control:
  
  [source]
  ----
  
negative.code: 
  === Npm Dependency
  
  Alongside with Bower dependencies, we also need to add one npm dependency to the project. `@vaadin/angular2-polymer` package adds support for Polymer elements in Angular 2 component templates. Run this command to install the package and save the dependency in [filename]#package.json# at the same time:
  
  [subs="normal"]
  ----
  