- Option 'smooth' permits now a better 'polishing' of the sticks.

- The default value for the precision of the sticks (unit length)
  has been put from 0.2 onto 0.05. If the sticks are shown, they do not 
  overlapp anymore.

- Code cleaning

- Due to the recent large changes of the code the addon has been tested 
  with even more PDB files.
  
  
Blendphys 

PS: see recent comment here: http://blenderartists.org/forum/showthread.php?235003-Atomic-Blender-for-loading-PDB-files-into-Blender-2.5&p=2079416&viewfull=1#post2079416