relax SVN archive

Updated comment about pipe creation in the noe.py sample script.

Removed all the run args to the user functions in the noe.py sample script.

Updated the noe.py sample script to use the new structure.load_spins() user function.

Bug fix in the test_opendx_theta_phi_da() system test.

The load_seq arg to the structure.read_pdb() user function no longer exists.

The position vector is added to the SpinContainer in the load_spins() function.

Created the test_load_protein_asp_atoms_from_pdb() system test.

This tests the loading of all aspartic acid atoms from the single residue in a loaded protein PDB
file.

Bug fix in the Scientific Python PDB object atom_loop() generator method.

The atom name is now returned rather than the element type!

Created the test_load_protein_gly_N_Ca_spins_from_pdb() system test.

This tests the loading of glycine backbone amide N and Ca spins from a loaded protein PDB file.

Added the system test test_load_protein_gly_N_spins_from_pdb().

This tests the loading the glycine backbone amide N spins from a loaded protein PDB file.

Bug fix for the system test of loading the protein backbone amide N spins from a loaded PDB file.