
<script>

  /**
   * Automatically extend using objects referenced in `behaviors` array.
   *
   *     someBehaviorObject = {
   *       accessors: {
   *        value: {type: Number, observer: '_numberChanged'}
   *       },
   *       observers: [
   *         // ...
   *       ],
   *       ready: function() {
   *         // called before prototoype's ready
   *       },
   *       _numberChanged: function() {}
   *     };
   *
   *     Polymer({
   *
   *       behaviors: [
   *         someBehaviorOb