relax SVN archive

Some fixes for the test_angles() system test.

'attached_proton' is now called 'attached_atom'.

Another fix for the __find_bonded_atom() Scientific PDB object method.

Small fix for one of the tests in vectors().

Fix for the Scientific PDB structural object atom_loop() method.

Empty molecule, residue, and spin names and numbers are now replaced with None before being returned.

Fix for the atom matching statement in the __find_bonded_atom() method.

Incomplete fixes for the __find_bonded_atom() method.

Fixed the setting up of the bond vector inside the SpinContainer.

Rearrangement of the header line print out.

Fix for the generic_fns.relax_re.search() function.

The re.search() function was clashing with the relax_re.search() function.

Added code to vectors() to determine if the attached atom is a proton or not.