relax SVN archive

Large simplifications to the generic_fns.residue.display() function.

This is in anticipation of the addition of the full_info flag to the residue loop.

Further simplifications to the generic_fns.spin.display() function.

Because of the modified spin loop, the function now only consists of 3 lines of code!!!

Large simplifications to the generic_fns.spin.display() function.

Modified the spin loop function to return the molecule name, res num, and res name if asked.

The full_info flag has been added which should significantly simplify much code.

Implemented the generic_fns.spin.display() function.

The format of the output is quite different from the generic_fns.residue.display() function. This
function will need to be updated.

Added a unit test for the generic_fns.spin.display() function.

Fixed a bug in the spin deletion unit test 'test_delete_num'.

Fixed a bug in the spin deletion unit test 'test_delete_shift'.

Fixed a bug in the spin deletion unit test 'test_delete_all'.

Fixed the spin creation 'test_creation' unit test.