Roll polymer packages to version 0.3.4

pkg/polymer/lib/polymer.dart

 // Copyright (c) 2014, 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.
 
 /// Custom HTML tags, data binding, and templates for building
 /// structured, encapsulated, client-side web apps.
 ///
 /// Polymer.dart, the next evolution of Web UI,
 /// is an in-progress Dart port of the
 /// [Polymer project](http://www.polymer-project.org/).
@@ skipping 19 matching lines @@
 /// Example code, project status, and
 /// information about how to get started using Polymer.dart in your apps.
 ///
 /// * [polymer.dart package](http://pub.dartlang.org/packages/polymer):
 /// More details, such as the current major release number.
 ///
 /// * [Upgrading to Polymer.dart](http://www.dartlang.org/polymer-dart/upgrading-to-polymer-from-web-ui.html):
 /// Tips for converting your apps from Web UI to Polymer.dart.
 library polymer;
 
-// Last ported from: Fri May 30 12:45:10 2014 -0700
-// https://github.com/Polymer/polymer-dev/tree/32cc3e470e8ed760a9e596a24fe9b3ac2a87737c
-
-// Note: we are still missing some tests for new features. Use
-// git diff 37eea00e13b9f86ab21c85a955585e8e4237e3d2 test
-// from polymer-dev to see the changes.
-
 import 'dart:async';
 import 'dart:collection';
 import 'dart:html';
 import 'dart:js' as js show context;
 import 'dart:js' hide context;
 
 // *** Important Note ***
 // This import is automatically replaced when calling pub build by the
 // mirrors_remover transformer. The transformer will remove any dependencies on
 // dart:mirrors in deployed polymer apps. This and the import to
@@ skipping 26 matching lines @@
 
 export 'package:observe/observe.dart';
 export 'package:observe/html.dart';
 export 'auto_binding.dart';
 
 part 'src/declaration.dart';
 part 'src/events.dart';
 part 'src/instance.dart';
 part 'src/job.dart';
 part 'src/loader.dart';
+part 'src/property_accessor.dart';