[IMP-dev] reading dna

[Daniel Russel <drussel@gmail.com>]

the IMP pdb reader now reads (at least some) dna. Ben should probably  
look through the code to make sure I am not abusing modeller somehow.
Also IMP.read_pdb now returns a MolecularHierarchyDecorator rather  
than a Particle. This seems more reasonable to me as you need the  
former in order to do anything useful with it.

Attachment: dna
Description: Binary data

Hopefully now files are missing.