title: Nested polymer elements not showing up?
body: <p>A simple nested <code>polymer-element</code> inside another one will not display:</p>
  
  <p><strong>index.html</strong></p>
  
  
  
  <pre class="lang-html prettyprint-override"><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
      &lt;head&gt;
          &lt;script src="lib/polymer.min.js"&gt;&lt;/script&gt;
          &lt;link rel="import" href="elements/indx-grid.html"&gt;
          &lt;link rel="import" href="elements/indx-griditem.html"&gt;
          &lt;title&gt;INDX-polymer&lt;/title&gt;
      &lt;/head&gt;
      &lt;body&gt;
          &lt;indx-grid&gt;
              &lt;indx-griditem&gt;&lt;/indx-griditem&gt;
          &lt;/indx-grid&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p><strong>indx-grid.html</strong></p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;polymer-element name="indx-grid"&gt;
  &lt;template&gt;
      &lt;style&gt;
          @host {
              :scope {
                  display: block;
                  margin: 20px;
                  border: 2px solid #E60000;
                  background: #CCC;
                  height: 500px;
              }
          }
      &lt;/style&gt;
  &lt;/template&gt;
  &lt;script&gt;
      Polymer('indx-grid');
  &lt;/script&gt;
  &lt;/polymer-element&gt;
  </code></pre>
  
  <p><strong>indx-griditem.html</strong></p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;polymer-element name="indx-griditem"&gt;
      &lt;template&gt;
          &lt;style&gt;
              @host {
                  :scope {
                      display: block;
                      margin: 10px;
                      border: 1px solid #000;
                      border-radius: 3px;
                      background: #FFF;
                      width: 100px;
                      height: 100px;
                  }
              }
          &lt;/style&gt;
      &lt;/template&gt;
      &lt;script&gt;
          Polymer('indx-griditem');
      &lt;/script&gt;
  &lt;/polymer-element&gt;
  </code></pre>
  
  <p>Strangely enough, although I can see it in developer tools in Chrome and CSS properties are all correct, the element will not display and not even have a 'size tooltip' while inspecting it with Chrome dev tools.</p>
  
  <p>Does someone have any clue about the problem here?</p>
  
  <p>Thanks</p>