title: Django 1.6 admin panel customization
body: <p>Now I'm developing a feedback application,</p>
  
  <p>So, the admin must see messages from users, filter them(read/unread) and mark them as important.
  I have already done all the functionality I need, but i cannot customize my headers.
  For example.
  There is a default header in change list(see the screenshot, this header is selected),
  How can I delete these headers or customize them?<img src="https://i.stack.imgur.com/bpuMI.png" alt="Screenshot">  </p>
  
  <p>Great thanks in advance.</p>