relax SVN archive

Removed the executable property from the test_float.py unit test module.

The command used was:
$ svn propdel svn:executable test_float.py

Copied the 'residue.py' files to implement the new 'spin' and 'molecule' user function classes.

Updated the residue.delete() user function prompt code.

The code was still that of sequence.delete()!

updates to get first mpi initialization working

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.