relax SVN archive

Made a few changes so the cpmg_delayT() function now works.

Removal of the __init__() methods so that the model-structure data structure is not automatically created.

Fixed a few typos.

Added the user function cpmg_delayT() which allows setting the CPMG constant time delay T used for
the analysed dataset.

This follows a post at:
https://mail.gna.org/public/relax-devel/2009-01/msg00027.html
(Message-id: <496583C7.6050607@...>)

Fixed many formatting errors and made the 'relax_disp' code accessible (pipes, interpreter, etc).

These changes also include a coming back to using the C code 'math_fns/relax_fit.py' since there is
still no such code associated to relaxation dispersion. This will allow workingin the code without
relax crashing and complaining about the lack of a C module name 'relax_disp.py'.

Included the setting of the spectrometer frequency and uncommented a few lines of code.

Of course, this won't work until the sample data has been introduced and the right namesfor the
different files be input in the system test script...

Created the StructList data structure for holding different structures.

Changed the index name and description.

This is as proposed by Ed in a post at:
https://mail.gna.org/public/relax-devel/2009-01/msg00029.html
(Message-id: <7f080ed10901080144u541e6ed5ve52d2d233f8d7cf7@...>)

The description might change later to be more appropriate when the code is more mature...

Created the ModelContainer data structure for holding all structures of the model.

Created the ModelList data structure for storing multiple models of the same molecule.