title: Multiple pluralisable variables in internationalized django template
body: <p>I am internationalizing (i18n) our django project, i.e. adding <code>{% blocktrans %}</code> to our templates. I know about using <code>count</code> and <code>{% plural %}</code> to have different strings for varaibles. However I have a string that has two variables that each need to be pluralized, i.e. 4 possible options.</p>
  
  <p>For example, my string is <code>"You have {{ num_unread }} unread message{{ num_unread|pluralize }} out of  {{ total }} total message{{ total|pluralize }}"</code></p>
  
  <p>How would I convert that to <code>blocktrans</code> tags?</p>