Introduce boot.js: this finally makes it possible to load and run Todomvc

example/todomvc/web/todo_row.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library todo_row;
 
 import 'package:observe/observe.dart';
 import 'package:polymer/polymer.dart';
 import 'model.dart';
 
 class TodoRow extends PolymerElement with ObservableMixin {
   @observable Todo todo;
 
   bool get applyAuthorStyles => true;
-  ScopedCssMapper get css => getScopedCss("todo-row");
+
+  // TODO(sigmund,terry): bring back scoped-css polyfills
 
   created() {
     super.created();
     var root = getShadowRoot("todo-row");
     var label = root.query('#label').xtag;
-    var item = root.query('.' + css['.todo-item']);
+    var item = root.query('.todo-item');
 
-    bindCssClass(item, css['.completed'], this, 'todo.done');
-    bindCssClass(item, css['.editing'], label, 'editing');
+    bindCssClass(item, 'completed', this, 'todo.done');
+    bindCssClass(item, 'editing', label, 'editing');
   }
 
   void removeTodo() => appModel.todos.remove(todo);
 }
+
+_init() {
+  registerPolymerElement('todo-row', () => new TodoRow());
+}