relax SVN archive

Fix for the relaxation curve-fitting _back_calc() method for the changes to the C module.

The setup() method requires that the scaling matrix is converted to a list of the diagonal elements.

Simplified the code of the relax_fit C module.

Fix for the target_functions.relax_fit C module - the scaling was incorrectly performed.

The scaling matrix is now converted into a usable list of diagonal elements for the relax_fit C module.

Parameter scaling is now functional in the target_function.relax_fit.c code.

Previously the scaling was not being used and the Python to C conversion was broken.

Removal of junk code in the _assemble_scaling_matrix() relaxation curve-fitting method.

The grid search bounds for the relaxation curve-fitting are no longer affected by scaling.

The parameter scaling activated a few commits ago revealed a bug in the lower and upper data
structures for the grid search in that these were continuously scaled down.

Fix for the relaxation curve-fitting _assemble_scaling_matrix() method.

The intensity scaling was never activated before due to a lower vs. uppercase parameter name
mismatch. This scaling is now correctly set up as the previous code assumed cdp.relax_times was a
list whereas it has been a dictionary since the early 1.3 releases.

The relaxation curve-fitting analysis parameters are now all lowercase.

This is to match the other analysis types so that the parameter names are identical to the
corresponding variable name. This is assumed by some of the specific analysis API methods.

The spin parameters are now set up last by the relax_disp.select_model user function back end.