relax SVN archive

Fix for the test_atom_loop_spin_selection2() unit test for the molecule naming.

Modified the atom_loop() method to handle the new data structure design.

Reverted revision 8418 as the file modified was not the good one...

Yes ! I modified 'relax_fit.py' instead of 'relax_disp.py'...

The command used was:
svn merge -r8418:8417 .

Converted the test_load_pdb() unit test to the new structural data design.

Started to implement a function for calculating the effective transversal relaxation rate (R2eff).

This follows a thread at:
https://mail.gna.org/public/relax-devel/2009-01/msg00067.html
(Message-id: <496B479D.3070304@...>)

Made a few corrections proposed by Ed in a post at:
https://mail.gna.org/public/relax-devel/2009-01/msg00066.html
(Message-id: <7f080ed10901120532h736892bbmd03483b4decadf39@...>)

Some copyright updates.

Added tests, print statements and other code to the relaxation dispersion specific functions.

Tests were proosed by Ed in a post at:
https://mail.gna.org/public/relax-devel/2009-01/msg00065.html
(Message-id: <7f080ed10901120107t4f1cd53ew51f498a45a38eade@...>)

When no structure ID is given, the '.pdb' is now stripped from the file name before creating the ID.

Modified __atom_index() to work within the MolContainer.