Roll Observatory packages and add a roll script

observe/lib/observe.dart

Index: observe/lib/observe.dart
diff --git a/observe/lib/observe.dart b/observe/lib/observe.dart
deleted file mode 100644
index 2f25f1a0975b794315efd87158900d3a38b96891..0000000000000000000000000000000000000000
--- a/observe/lib/observe.dart
+++ /dev/null
@@ -1,25 +0,0 @@
-// 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 observe;
-
-// This library contains code ported from observe-js:
-// https://github.com/Polymer/observe-js/blob/0152d542350239563d0f2cad39d22d3254bd6c2a/src/observe.js
-// We port what is needed for data bindings. Most of the functionality is
-// ported, except where differences are needed for Dart's Observable type.
-
-export 'src/bindable.dart';
-export 'src/bind_property.dart';
-export 'src/change_notifier.dart';
-export 'src/change_record.dart';
-export 'src/list_path_observer.dart';
-export 'src/list_diff.dart' show ListChangeRecord;
-export 'src/metadata.dart';
-export 'src/observable.dart' hide notifyPropertyChangeHelper;
-export 'src/observable_box.dart';
-export 'src/observable_list.dart';
-export 'src/observable_map.dart';
-export 'src/observer_transform.dart';
-export 'src/path_observer.dart' hide getSegmentsOfPropertyPathForTesting;
-export 'src/to_observable.dart';