relax SVN archive

Fix for the test_read_pdb_complex_scientific() system test.

Retarded Scientific python splitting a perfectly good molecule into 2 when it can't recognise a
residue type!

Fixed an import (as well as a few comments).

This however introduces an error concerning the 'chi2' being undefined in the C module for
relaxation dispersion...

The read_mol arg now does something in load_pdb()!!!

Added error checking to load_pdb() for when the number of molecules exceeds the set_mol_name list.

Another fix for the load_pdb() method.

The mol_offset value should be calculated at all times!

More fixes for load_pdb().

Collapsing 2 models into 1 was failing.

Fixes for the load_pdb() method.

Previously loaded structures were not being taken into account.

Fixes for the test_read_pdb_mol_2_model_scientific() system test.

The Scientific python PDB reader somehow decided to split the single structures in
'lactose_MCMM4_S1_*.pdb' into 2.

Bug fix for the load_pdb() method.

When set_model_num is None, this is now handled properly.

Duplicated 5 systems tests of the internal PDB reader for the Scientific python PDB reader.