Adds a sample for polymer internationalization/localization

samples/polymer_intl/web/messages_pt.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
 /**
- * This is a library that provides messages for a German locale. All the
+ * DO NOT EDIT. This is code generated via pkg/intl/generate_localized.dart
+ * This is a library that provides messages for a pt locale. All the
  * messages from the main program should be duplicated here with the same
  * function name.
  */
-library messages_de;
-import 'package:intl/intl.dart';
+
+library messages_pt;
 import 'package:intl/message_lookup_by_library.dart';
 
 final messages = new MessageLookup();
 
 class MessageLookup extends MessageLookupByLibrary {
 
-  get localeName => 'de';
+  get localeName => 'pt';
+  static helloWorld() => "Olá, mundo do Dart!";
 
-  final messages = {
-    "runAt" : (time, day) => Intl.message("Ausgedruckt am $time am $day.")
+  final messages = const {
+    "helloWorld" : helloWorld
   };
-}
-
+}