Finish adapting annihilation for Hellmann--Feynmann sampling.
Finish adapting annihilation for Hellmann--Feynmann sampling.

Calculate and store the <D_i|O|D_i> values for new determinants.

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