relax SVN archive

Updated the Relax_disp.test_hansen_cpmg_data_missing_auto_analysis system test for the recent changes.

This is for fixing bug #21960 (https://gna.org/bugs/?21960).

The chi-square values are different due to the fix for bug #21954, the peak intensity error analysis
bug, and the CR72 model (http://wiki.nmr-relax.com/CR72) results are different due to the fix for
bug #21953, the change of the kex values used in the grid search.

Extended --gui-tests Relax_disp.test_hansen_trunc_data.

Regarding bug #21954, (https://gna.org/bugs/index.php?21954) - Order of spectrum.error_analysis is important.

To cath errors in this dataset.

Fix for bug. The variances used to calculated std, should only be taken from those which are defined in the subset.

Regarding bug #21954, (https://gna.org/bugs/index.php?21954) - Order of spectrum.error_analysis is important.

Further extended systemtest Relax_disp.test_sod1wt_t25_bug_21954_order_error_analysis.

Regarding bug #21954, (https://gna.org/bugs/index.php?21954) - Order of spectrum.error_analysis is important.

Python 3 fix for the Relax_disp.setup_sod1wt_t25 systemtest.

The xrange builtin function does not exist in Python 3.

Undid the modification of dw and kex in systemtest Relax_disp.test_tp02_data_to_tap03.

Regarding bug #21953, (https://gna.org/bugs/index.php?21953) - Weird performance of grid search

The number of iterations needed to be increased from 2000 to 2500 to allow the values to be found.

Small edit of the relax command line option descriptions.

Forgotton to remove systemtest, which was renamed.

Started implementation of error analysis bug.

Regarding bug #21954, (https://gna.org/bugs/index.php?21954) - Order of spectrum.error_analysis is important.

Splitted systemtest Relax_disp.sod1wt_t25_to_cr72 into part as setup and test part.

Regarding bug #21953, (https://gna.org/bugs/index.php?21953) - Weird performance of grid search