Various minor cleanups.

git-svn-id: https://svn.blender.org/svnroot/bf-extensions/contrib/py/scripts/addons@4446 96b784f8-4ae3-dd11-aff7-0030488c597c
With respect to the changes of the PDB IO I had to make some slight
changes also in the Atomic Blender panel.
 
Blendphys.





git-svn-id: https://svn.blender.org/svnroot/bf-extensions/contrib/py/scripts/addons@4448 96b784f8-4ae3-dd11-aff7-0030488c597c