relax SVN archive

Updates for the 'MMQ 2-site' model equations in the manual.

Returned the 'MMQ 2-site' model equations to those of the Korzhnev et al., 2004 paper.

These equations were not incorrect.

Added text about the relax_disp.insignificance user function to the dispersion chapter of the manual.

Improvements for the dispersion API eliminate() method.

Created a new section in the dispersion chapter of the manual covering optimisation.

This describes the auto-analysis, the chi-squared function, the grid search values, how optimisation
is implemented, the linear constraints used, the diagonal scaling, model elimination, and the use of
OpenMPI. It absorbs the clustering section.

Bug fix for the recently added dispersion API eliminate method.

This was accidentally always eliminating the model.

The relaxation dispersion target function class can now handle cpmg_frqs arguments of None.

This is useful for R1rho models.

Model elimination is now activated in the dispersion auto-analysis.

Implemented model elimination for the relaxation dispersion analysis.

This currently uses the pA limits of 0.501 < pA < 0.999 to determine if a model has failed.

To implement this, the dispersion API methods deselect(), eliminate(), get_param_names() and
get_param_values() were written. These were copied from the model-free analysis and modified as
needed.

Merged the 'MQ CR72' dispersion model into the MMQ data type sections in the tables of the manual.