title: twig templates not extends
body: <p>In Slim I use the twig templates.
  I have in /views/email/auth/registered.php</p>
  
  <pre><code>{% extends 'email/templates/default.php' %}
  
  {% block content %}
      You have registered!
  {% endblock %}
  </code></pre>
  
  <p>and /views/email/templates/default.php I have</p>
  
  <pre><code>{% if auth %}
      &lt;p&gt;Hello {{ auth.getFullNameOrUsername }},&lt;/p&gt;
  {% else %}
      &lt;p&gt;Hello there,&lt;/p&gt;
  {% endif %}
  
  {% block content %}{%  endblock %}
  </code></pre>
  
  <p>but when I render registered.php templates i Obtain only</p>
  
  <pre><code>You have registered!
  </code></pre>
  
  <p>the templates isnt extend <code>default.php</code></p>