Added relax analysis script, to profile distribution of errors drawn in relax, and from python module "random".
It seems that relax draw a lot more narrow distribution of Intensity with errors, than python module "random".
This has an influence on estimated parameter error.
This is a potential huge error in relax.
A possible example of a catastrophic implementation of Monte-Carlo simulations.
task #7822(https://gna.org/task/index.php?7822): Implement user function to estimate R2eff and associated errors for exponential curve fitting.
