relax SVN archive

A number of bug fixes for the Scientific python structural object load_pdb() method.

The molecules are now also taken from the peptide_chains and nucleotide_chains structures, as the
molecules dictionary doesn't contain proteins or RNA!

The Scientific python structural object load_pdb() method now uses pack_structs().

Fixed the default value for the verbosity keyword to load_pdb().

Removed a debugging print out.

Bug fix for the load_pdb() method in the MolContainer setup.

Another bug fix for the pack_structs() method, the MolList.add_item() was incorrectly being called.

Bug fixes for the load_pdb() method.

Bug fixes for the pack_structs() method.

The internal structural object load_pdb() method now uses the pack_structs() base class method.

Deletion of commented out code.

This includes the pointers to other structural objects. These pointers, rather than using new
structures could be dangerous additional data is added to the object. Therefore this code must be
eliminated.