Fix for synthetic script calling back_calc_r2eff() with old arguments and to use list of spin containers and ids.
Bug #22754 (https://gna.org/bugs/index.php?22754): The minimise.calculate() does not calculate chi2 value for clustered residues.
Authored by: tlinnet 2014-10-06
Parent: [r26156]
Child: [r26158]
