title: jquery selector does not work on element inside script tag using Cassette
body: <p>When trying to access data-onload using <code>$("#index").data("onload")</code> I get back <code>'undefined'</code>:</p>
  
  <pre><code>&lt;script type="text/html"&gt;
          &lt;section id="index" data-onload="app.load()"&gt;
              &lt;div data-bind="text:name"&gt;&lt;/div&gt;
          &lt;/section&gt;
  &lt;/script&gt;
  </code></pre>
  
  <p>Without the surrounding script tag everything works fine. This is loaded using <a href="http://getcassette.net/" rel="nofollow">Cassette</a> which wraps it inside script tags.</p>
  
  <p>What am I doing wrong?</p>