relax SVN archive

Missing imports for the new pipe_control.chemical_shift module.

Modified the peak list object.

The peak list dimensionality variable is no longer private, and many values of None are now
converted to lists of None so that the peak list data is easier to handle.

Renamed all of read_*() functions of the lib.spectrum modules for consistency.

These functions will now be used to read all types of data from a peak list, from the assignments
to chemical shifts to peak intensites, and everything in between.

Shifted all the modules from lib.software to do with peak lists to lib.spectrum.

This is for a more logical organisation, as these modules are solely used by the
lib.spectrum.peak_list module.

Removed an unused import.

Created the chemical_shift.read user function.

This includes both the front and back end code.

Created some incredibly basic icons for the chemical shift user functions.

These are simply an omega symbol and will need to be replaced by something better in the future.

Created the Chemical_shift.test_read_sparky system test for the reading of chemical shifts.

This is for the reading of shifts from a Sparky peak list. It tests the currently non-existent
chemical_shift.read user function.

Added support for the TSMFK01 model to the relax_disp.select_model user function back end.

Progress sr #3071: https://gna.org/support/index.php?3071 - Implementation of Tollinger/Kay dispersion model (2001)
Following the guide at: http://wiki.nmr-relax.com/Tutorial_for_adding_relaxation_dispersion_models_to_relax

Troels E. Linnet provided this patch. Commit by: tlinnet _aaattt_ gmail_dot_com

Signed-off-by: Edward d'Auvergne <edward@...>

Fix for converting dw from ppm to rad/s.

Progress sr #3071: https://gna.org/support/index.php?3071 - Implementation of Tollinger/Kay dispersion model (2001)
Following the guide at: http://wiki.nmr-relax.com/Tutorial_for_adding_relaxation_dispersion_models_to_relax

Troels E. Linnet provided this patch. Commit by: tlinnet _aaattt_ gmail_dot_com

Signed-off-by: Edward d'Auvergne <edward@...>