First group of routing examples

example/angular/routing/nesting_routes/my_router.dart

+library my_router;
+
+import 'package:angular/angular.dart';
+
+class MyRouteInitializer implements RouteInitializer {
+  init(Router router, ViewFactory view) {
+    router.root
+      ..addRoute(
+          name: 'articles',
+          path: '/articles',
+          mount: (Route route) => route
+            ..addRoute(
+                name: 'all',
+                path: '/all',
+                enter: view('views/all_articles.html'))
+            ..addRoute(
+                name: 'featured',
+                path: '/featured',
+                enter: view('views/featured_article.html')));
+  }
+}