npm_modules: Fork bower_components into Polymer 0.4.0 and 0.5.0 versions

polymer_0.4.0/bower_components/core-a11y-keys/core-a11y-keys.html

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     @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
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     The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
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@@ skipping 310 matching lines @@
         this._desiredKeys = normalized.toLowerCase().split(' ').map(stringToKey);
       },
       targetChanged: function(oldTarget) {
         unlisten(oldTarget, this._keyHandler);
         listen(this.target, this._keyHandler);
       }
     });
   })();
 </script>
 </polymer-element>