title: using django filters in jinja2
body: <p>I am developing an application on appengine, and want to use the awesome <code>timesince</code> django templatetag. Since I am using jinja2, I do not have the timesince filter available. How can I import it from django and use in jinja template. </p>
  
  <p>I saw <a href="https://stackoverflow.com/questions/4799715/jinja2-templates-using-django-template-tags">this question</a>, but it does not serve the need. </p>