relax SVN archive

Fixes for the test_read_pdb_mol_2_model_internal() system test.

The checks were incorrect.

Wrote 3 system tests for the new design of the structural data handling.

These include:
test_read_pdb_mol_2_model_internal()
test_read_pdb_model_2_mol_internal()
test_read_pdb_complex_internal()

Fix for the test_load_scientific_results() system test.

The res_name was coming out as a tuple, so now it is unpacked.

Fix for the test_load_scientific_results() system test.

The path is now set.

Changed the relax results file to include the full path to the PDB file.

Removed an empty line.

Fix for the MolContainer.reload_pdb() method.

The molecule number and not index should be checked!

Added a print out for MolContainer.reload_pdb().

Created the MolContainer.reload_pdb() method to be used by from_xml().

Fixes for the test_load_scientific_results() test.

The atom_loop() method is now called to loop over the residues (using '@N').