Added a function to test for convergence after each round in the 'full_analysis.py' script.
This is in response to the convergence question asked by Sebastien Morin in the post located at
https://mail.gna.org/public/relax-users/2006-11/msg00015.html (Message-id:
<456515E5.6020908@...>).
There are three convergence tests:
Identical chi-squared values.
Identical model-free models.
Identical model-free parameter values.
