relax SVN archive

Created the lib.dispersion.equations.calc_two_point_r2eff_err() function.

This complements the lib.dispersion.equations.calc_two_point_r2eff() function and is used by the
dispersion calculate() method to abstract the mathematics.

Better checking of optimisation in the Relax_disp system tests.

This affects the Relax_disp.test_hansen_cpmg_data_LM63 and Relax_disp.test_hansen_cpmg_data_CR72
system tests. Instead of using the auto-analysis, these tests now set the initial parameters close
to the minimum, skip the grid search, and perform a low precision optimisation to reach the minimum.
This is important because the low quality grid search and optimisation can not always find the real
minimum.

Fix for the Relax_disp.test_hansen_cpmgfit_input system test.

This is for the recent CPMGFit batch file changes.

Created the Relax_disp.test_hansen_cpmg_data_auto_analysis system test.

This is designed to fully test the dispersion auto-analysis for CPMG-type data.

Updated the CPMGFit batch file.

Fix for the CPMGFit batch file creation.

The command line options are now correct and output is redirected to output files.

Updated some NESSY results in the software comparison document.

Fixes for the checks and printouts of the Relax_disp.test_hansen_cpmg_data_LM63 system test.

Increased the grid size for the hansen_data.py system test script.

This is needed to allow the parameters to be reliably found.

Fix for the Relax_disp system tests using Flemming Hansen's truncated CPMG data.

The nuclear isotope is now being set.