title: Checking number of times CSS classes called.
body: <p>I was thinking of writing a script which would tell me:</p>
  
  <ul>
  <li>How often each CSS class defined in my .css file is used in my code</li>
  <li>Redundant CSS classes - classes never used</li>
  <li>CSS classes hat are referenced that don't exist.</li>
  </ul>
  
  <p>But I just want to make sure something like this doesn't exist already? Does it?</p>
  
  <p>Thanks</p>