Roll Observatory packages and add a roll script

packages/intl/lib/src/lazy_locale_data.dart

 // Copyright (c) 2012, 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 defines a class for loading locale data incrementally from
  * an external source as JSON. The external sources expected are either
  * local files or via HTTP request.
  */
 
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   }
 
   /**
    * Given a Future [input] whose value is expected to be a string in JSON form,
    * return another future that parses the JSON into a usable format.
    */
   Future jsonData(Future input) {
     return input.then((response) => JSON.decode(response));
   }
 }