TODO for pymol
--------------

  + change to use tilde in version for RC candidates
  
  + what are the kde-pymol.desktop and gnome-pymol.desktop files used for?
  
  + replace the install and cp calls if possible by debhelper script calls

  + include scripts/
  
  ? For now this command fails with segmentation fault:
    xvfb-run -a -s '-screen 0 700x500x24' \ 
      pymol contrib/champ/test/20export_naming.py
  Checked on sid-amd64 VM. Probably tests in contrib/champ/test are outdated.
