relax SVN archive

Fixes for the checks in the Relax_disp.test_exp_fit system test.

The r2eff and i0 spin data structure keys are now strings.

Fixes for the backend of the relax_disp.plot_exp_curves user function.

This code needed to be updated for the major changes in the relax_disp branch.

Fixes for the peak intensity loading wizard for the frq.set to spectrometer.frequency user function change.

Fix for the linear constraints for the 'R2eff' model.

The A and b matrices are no longer set to None, as this kills the auto-analysis or any analysis when
constraints are turned on. Now the constraints 0 <= R2eff <= 200 and I0 >= 0 are used.

Implemented a basic graph for the relax_disp.plot_disp_curves user function.

This simply plots out the nu_CPMG value or spin-lock field verses the R2eff/R1rho values from the
experiment. The graph of the back calculated R2eff/R1rho values from the model fit is still to be
added.

The relaxation dispersion auto-analysis now calls the relax_disp.plot_disp_curves user function.

This user function is not implemented yet, but will be used to create plots of the dispersion curves.

Fixes for the checking in the Relax_disp.test_hansen_cpmgfit_input system test.

An upper limit of 200 rad/s has been added to the linear constraints for the R2 dispersion parameters.

The spectrum wizard now uses the spectrometer.frequency user function rather than frq.set.

The frq.set user function is now called spectrometer.frequency.

Changed the dispersion GUI tab to use the model names from specific_analyses.relax_disp.variables.