As discussed a couple of times in the IRC chat, we decided to separate the

panel from the import/export addons. This means that the panel has had to be 
removed also from the PDB importer/exporter. This is what I have done.

Attention, this is a major change of the Atomic Blender PDB importer/exporter!

A lot of test today have shown, that the new version of the PDB 
importer/exporter has not lost its stability. In the next days, I will perform 
other stability tests.

Blendphys