title: Bukkit /seen command
body: <p>I was wondering how to make a seen command like in <a href="http://dev.bukkit.org/bukkit-plugins/essentials/" rel="nofollow">Essentials</a>. I've tried many things, yet I still am not able to get it to work.</p>
  
  <p>How can I add a <code>/seen</code> command to my Bukkit plugin?</p>