Selection of reference det from input options.
Selection of reference det from input options.

The reference det in FCIQMC is now set using the spin polarisation
set in the input file.

The symmetry selected in the input is currently ignored by FCIQMC.

hande-qmc/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande,ruthfranklin/hande,hande-qmc/hande