relax SVN archive

Further modifications for compatibility with the new relax Data object.

The data unit-tests have been fixed, and all import statements in client
modules updated.

initial work to add multiprocessor startup and refactoring of main Relax
class

Wrote unit tests for the currently non-existant 'generic_fns.residue.delete()' function.

Created the 'generic_fns.residue.copy()' function.

Two unit tests for this function have been added.

Fixed the unit tests for the 'generic_fns.pipes' module.

The relax data storage singleton object is now reset at the start of the setUp unit test method.

Important fix for the PipeContainer data structure.

All of the objects of the PipeContainer where being instantiated as objects of the class rather than
the separate instances. Hence two different PipeContainer instances contained the same objects!
All object instantiation is now done within the __init__() method to avoid the problem.

Modified generic_fns.residue.create() to replace the empty first residue if no residues exist.

Wrote two unit tests for testing the generic_fns.residue.create() function.

Fixes for the unit tests of the relax data storage singleton methods.

Alternative implimentation of the data object as a singleton.

As proposed here:
https://mail.gna.org/public/relax-devel/2007-03/msg00013.html

and agreed here:
https://mail.gna.org/public/relax-devel/2007-03/msg00058.html#