Roll Observatory packages and add a roll script

packages/polymer_interop/lib/src/js/polymer.js

 /**
  * @license
  * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
  * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
  * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
  * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
  * Code distributed by Google as part of the polymer project is also
  * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
  */
 // @version 0.5.5
@@ skipping 11839 matching lines @@
       syntax.prepareBinding = function(pathString, name, node) {
         return events.prepareEventBinding(pathString, name, node) ||
                prepareBinding.call(syntax, pathString, name, node);
       };
       return syntax;
     }
 
   });
 
 })();