relax SVN archive

A final fix for bug #19887 (https://gna.org/bugs/?19887).

Now a RelaxError is raised if the number of peak intensities is not the same for all spins. This
occurs in the relaxation curve-fitting overfit_deselect() method.

Partial fix for bug #19887 (https://gna.org/bugs/?19887).

The problem is that the number of peak height values was not the same for all spins!

The error message was being caused by the math_fns.relax_fit C object 'setup' function being feed in
incorrect values, causing relax to fail directly after the setup() call in
specific_fns.relax_fit.minimise(). The number of points was being taken from cdp.relax_times, but
in the Relax_fit.test_bug_19887_curvefit_fail system test, one of the 3 spins has 4 points rather
than 5. Now the correct number is sent into setup().

Created a system test to replicate Romel Bobby's bug #19887.

This is the bug report at https://gna.org/bugs/?19887.

Fixes for all the Relax_data system tests for the interatomic data design.

Fix for the Modelim.test_te_200ns() system test for the interatomic data design.

Updated the OMP model-free results XML files for the interatomic data container select flag.

The old files were missing the select flag.

Fix for the model-free _determine_model_type() method.

This should skip deselected spin rather than spins without relaxation data!

Converted the Rdc.test_rdc_load() system test to the interatomic data design.

Converted another test suite RDC data file to the interatomic data design.

Fix for the rdc.read user function - values and errors of None in the file are supported again.

This was broken with the interatomic data redesign.