title: template dom-repeat for an Object?
body: <p>I was looking at <code>dom-repeat</code>ers with the template tag.  So i was going to walk an array.  I wanted to then walk the properties of the object itself.</p>
  
  <p>I didnt see anything online though.  I was thinking of something like</p>
  
  <pre><code>&lt;template is="dom-repeat" items="{{data}}" as="row"&gt;
    &lt;template is="dom-repeat" items="{{row}}" as="prop"&gt;
      &lt;div&gt;{{prop}}&lt;/div&gt;
    &lt;/template&gt;
  &lt;/tempalate&gt;
  </code></pre>
  
  <p>but the console throws one of those terrible stack traces about null not having the method "_badUpgrade".  Maybe there is better documentation for 1.0 Polymer as to repeating over a dynamic object?</p>
  
  <p>My end state is to create a datagrid allowing dynamic headers and dynamic data....   so the keys of the headers have to be a subset of the data properties so the correct items are assigned under the correct columns etc</p>