relax SVN archive

Created the SpinContainer.is_empty() method.

The molecule, residue, spin object stack in the relax data store is being modified, expect massive
breakages until this is resolved!

Added missing imports.

Added missing imports and corrected calls to modules from generic_fns.

In previous revisions (5258, 5259, 5260, 5261, 5264, 5265, 5276, 5282, 5283), as part of the
modifications to the new design, these calls to the modules were erroneously instantiated (as is
done for the modules from specific_fns).

The reasons for these changes were specified by Edward d'Auvergne in a post at:
https://mail.gna.org/public/relax-devel/2008-04/msg00029.html (# Message-id:
<7f080ed10804040101n5cc2c69flc3cf0a894389e8f1@...>)

Added a missing RelaxError import and the copyright statement.

Fix for the setUp() method, as empty SpinContainers are now automatically overwritten.

Fixed the RelaxError import statement.

Added a missing RelaxError import.

Added the JBNMR reference to the full_analysis.py sample script.

Added a copyright statement to the full_analysis.py sample script.

The purpose of this is so the user knows who the author of the script was and how ancient the script
is, as well as allowing the file to be redistributable.

Added a copyright statement to the relax_fit.py sample script.

The purpose of this is so the user knows who the author of the script was and how ancient the script
is, as well as allowing the file to be redistributable.