Fixes for the Relax_disp.test_exp_fit system test - the spectrometer frequency is now set.

This information is now compulsory.
Converted references of ka and kA to k_AB.

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@nmr-relax.com>
Updated the CPMG dispersion analysis sample script for the relax_disp.exp_type user function changes.
Updated the user manual for the relax_disp.exp_type user function changes.

The script in the prompt/script UI section of the dispersion chapter needed to be updated.
Referencing fixes for the dispersion chapter of the user manual.
Updated the scripts and save files for the KTeilum_FMPoulsen_MAkke_2006 dispersion data.

This is for the recent relax_disp.exp_type user function changes and this allows the tests to pass.
Information on how to run the scripts and tee the output to logs has been added, and the logs added
to the repository.