title: Change default date formatter in active admin
body: <p>In <a href="http://activeadmin.info/documentation.html" rel="noreferrer">ActiveAdmin</a> dates are printed in the, supposedly American, format <code>%B %d, %Y %H:%M</code>. E.g. <code>March 19, 2013 13:25</code></p>
  
  <p>However, my "default" frontend prints this using the default Rails (ISO) format, <code>2013-03-07 14:12:31 UTC</code>, as seen when dropping a <code>&lt;%= Date.new %&gt;</code> anywhere in a view.</p>
  
  <ol>
  <li>What is defining the format for the ActiveAdmin dates?</li>
  <li>Where or how can this be changed, if possible, simply following a global Rails wide i18n setting.</li>
  </ol>