QMC settings in dedicated module
I want to put the QMC setting parameters, i.e., the VAR_QMC and VAR_TEMP members and derived variables, into a dedicated module. In some models, it might be useful to know the updating scheme or the number of sweeps, but there is no nice way to access this information within the Hamiltonian. Once they are in a module, a simple "use QMC_settings" would suffice.