title: How do I get django-allauth to send html emails
body: <p>Cookiecutter-django uses:</p>
  
  <ul>
  <li>django-allauth (which needs to send registration confirmation emails)</li>
  <li>django-anymail configured to use mailgun.</li>
  </ul>
  
  <p>Things are mostly working. But I can't figure out why I'm only getting plain text emails instead of HTML emails. I do have html emails defined in templates/account.</p>
  
  <p>I must be missing a configuration setting someplace. But it looks like just the presense of the .html files should be enough.</p>
  
  <p>So how do I get django-allauth to send html emails?</p>