relax SVN archive

Fixes for the lib.dispersion.it99 module.

This is mainly because the omega_1eff parameter was not being correctly converted from the nu_cpmg
values.

Fixed the scaling of the parameter tex.

Updated the CPMGFit results for the IT99 model using Flemming Hansen's CPMG data.

Replaced '-' with 'N/A' if the software is missing the model.

This is for the software comparison table using Flemming Hansen's CPMG data.

Added the IT99 model to the software comparison table for Hansen's CPMG data.

This includes only the results from relax (and possibly not fully debugged results at that).

Removed an unnecessary calculation from the lib.dispersion.it99.r2eff_IT99() function.

Added the relax optimisation results for the IT99 model applied to Flemming Hansen's CPMG data.

Basic fixes for the lib.dispersion.it99 module.

Fix for the setup of the relaxation dispersion target functions for the IT99 model.

Changed the CPMGFit grid search options for the IT99 model in the relax_disp.cpmgfit_input user function.