Support for calculating multiple operators on an exact wavefunction.
Support for calculating multiple operators on an exact wavefunction.

For now, we'll just calculate everything we can.  This is a pretty dumb
implementation...

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