title: hibernate envers 4: enable delete listenert
body: <p>I need your help: I'm using hibernate envers 4.1.12 and I would like to enable only the delete listener, but I'm not able to do it. 
  I know that starting from hibernate 4 there is no longer need to declare the listener in the configuration file, but by default all the operations are triggered in the audit tables and I need to monitor only the delete ones.</p>
  
  <p>Could you help me?</p>
  
  <p>Thanks in advance.</p>