Roll Observatory packages and add a roll script

packages/template_binding/lib/js/node_bind.js

 // 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
 
 (function(global) {
   'use strict';
 
@@ skipping 323 matching lines @@
 
     var observable = value;
     var binding = bindInputEvent(this, name, observable);
     updateInput(this, name,
                 observable.open(inputBinding(this, name)));
 
     // Option update events may need to access select bindings.
     return updateBindings(this, name, binding);
   }
 })(this);