relax SVN archive

The frame order auto-analysis now calls the time() user function.

This is used at the start of each model section, as well as at the very start and very end of the
analysis. This feedback is needed for the user to be able to optimise the optimisation settings.

Comment fix for the target_functions/relax_fit.c file.

Removed the comment and docstring saying that the exponential curve-fitting gradient is unimplemented.

Shifted all of the parameter Python lists to C arrays into the new param_to_c() function.

This is for the target_functions.relax_fit C module to avoid much duplicated code.

Changed the array declarations in the target_functions/c_chi2 C file and header.

Instead of using the pointer format of *xyz, the array format of xyz[] is now being used. These are
equivalent and the later is more obvious that this is an array.

Changed the array declarations in the target_functions/exponential C file and header.

Instead of using the pointer format of *xyz, the array format of xyz[] is now being used. These are
equivalent and the later is more obvious that this is an array.

More removal of code.

task #7822(https://gna.org/task/index.php?7822): Implement user function to estimate R2eff and associated errors for exponential curve fitting.

Removed all unnessary code from estimate R2eff module.

task #7822(https://gna.org/task/index.php?7822): Implement user function to estimate R2eff and associated errors for exponential curve fitting.

Modified verify error script, to use new estimate R2eff module.

task #7822(https://gna.org/task/index.php?7822): Implement user function to estimate R2eff and associated errors for exponential curve fitting.

Modified profiling script to use the new estimate R2eff module.

task #7822(https://gna.org/task/index.php?7822): Implement user function to estimate R2eff and associated errors for exponential curve fitting.