relax SVN archive

Changed the Grace string for the rex parameter to be phi_ex.

Changed the phi_ex parameter in the LM63 model back to rex.

Fix for the relaxation dispersion auto-analysis.

The data pipes created for each model optimised are now switched to prior to any operations on the
pipe.

Modified the printouts of the relax_disp.select_model user function.

More spacing before the sectioning printouts in the relaxation dispersion auto-analysis.

Spun out a number of dispersion methods into the new specific_analyses.relax_disp.parameters module.

This is a module of functions relating to the parameters of the relaxation dispersion models.

Updated the backend of the relax_disp.select_model to handle the new model names.

Updated the models in the script for the full relaxation dispersion analysis of Hansen's data.

Created a script for running a full relaxation dispersion analysis on Flemming Hansen's data.

This is located in the shared data directories and is not part of the test suite as a full analysis
will take far too long.

Completed the relaxation dispersion calculate() method.

This allows the R2eff/R1rho values to be calculated for the fixed relaxation time period
experiments through the calc user function.