title: Embed partial templates with Backbone / Marionette / Underscore templates
body: <p>In Marionette with Underscore templates, is it possible to 'include' one template file into another template file - so that common markup can be shared across multiple templates?</p>
  
  <p>We use requireJS to load the .tpl files as and when - and then assign a tpl file to a Marionette view;</p>
  
  <pre><code>  View.MyView = Marionette.ItemView.extend({
          template: 'parent_template.tpl'
    });
  </code></pre>
  
  <p>Where 'parent_template.tpl' contains something like.</p>
  
  <pre><code>  &lt;h1&gt;A Parent View&lt;/h1&gt;
    &lt;button class='btn-one'&gt;One&lt;/button&gt; 
    &lt;button class='btn-two'&gt;Two&lt;/button&gt;
    &lt;button class='btn-three'&gt;three&lt;/button&gt;
  </code></pre>
  
  <p>What I would like to do is extract say the buttons to a common tpl, that other tpl's could use, something like...</p>
  
  <p>Where 'parent_template.tpl' contains something like.</p>
  
  <pre><code>  &lt;h1&gt;A Parent View&lt;/h1&gt;
     {{child_template.tpl}}
  </code></pre>
  
  <p>And 'child_template.tpl' contains something like.</p>
  
  <pre><code>  &lt;button class='btn-one'&gt;One&lt;/button&gt; 
    &lt;button class='btn-two'&gt;Two&lt;/button&gt;
    &lt;button class='btn-three'&gt;three&lt;/button&gt;
  </code></pre>
  
  <p>And then lots of other templates could pull in the shared template.</p>
  
  <p>Any ideas?</p>