title: Group fields in Django's admin forms
body: <p>I'm pretty new to Django and experimenting with it.</p>
  
  <p>I've read a quite amount of docs about the framework but I could not find information on how to <strong>"group" fields in admin forms</strong>.</p>
  
  <p>What I mean by grouping is having an <em>arbitrary number of fields grouped under an arbitrary subsection</em> (the way the subsection is represented graphically is not important).</p>
  
  <p>Is it possible to "natively" do that (by natively, I mean without overriding any Admin Form)?</p>