Roll Observatory packages and add a roll script

packages/polymer/lib/deploy.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.
 
 /// **Note**: If you already have a `build.dart` in your application, we
 /// recommend to use the `package:polymer/builder.dart` library instead.
 
 /// Temporary deploy command used to create a version of the app that can be
 /// compiled with dart2js and deployed. Following pub layout conventions, this
 /// script will treat any HTML file under a package 'web/' and 'test/'
@@ skipping 168 matching lines @@
     _showUsage(parser);
     return null;
   }
 }
 
 _showUsage(parser) {
   print('Usage: dart --package-root=packages/ '
       'package:polymer/deploy.dart [options]');
   print(parser.getUsage());
 }