title: Sonata change default format_date
body: <p>I have installed the <code>SonataIntlBundle</code>bundle. The default format_date results in a format like <code>day-number month-name year</code>.</p>
  
  <p><code>{{ date_time_object | format_date }} =&gt; '1 août 2011'</code><a href="http://sonata-project.org/bundles/intl/master/doc/reference/datetime.html" rel="nofollow">Source</a></p>
  
  <p>Now, I want to change this default to <code>dayNumber-monthNumber-yearNumber</code> for people with a english translation (en) and to <code>monthNumber-dayNumber-yearNumber</code>for people with a dutch translation (nl). How should I do this and is their any documentation?</p>