title: Mustache nested structures unclosed section bug
body: <p>I have this very simple structure which can not be parsed with mustache and always returns:</p>
  
  <p><strong>Unclosed section: selected</strong></p>
  
  <pre><code>&lt;ul id="source"&gt;
  {{#recomms}}                                                                                                                                                                                                 
    &lt;li&gt;
      &lt;select&gt;
        {{#sizes}}
          &lt;option {{#selected}}selected="selected"{{/selected}} &gt;{{label}}&lt;/option&gt;
        {{/sizes}}
      &lt;/select&gt;
    &lt;/li&gt;
  {{/recomms}}
  &lt;/ul&gt;
  </code></pre>
  
  <p>Rendering javascript:</p>
  
  <pre><code>$("#placement").html(Mustache.render($('#source').html(), data));
  </code></pre>
  
  <p>If I move #{{selected}} out of an option tag it starts to work properly.</p>
  
  <p>Does mustache support these nested #{{ tags placed within html elements ?</p>