Correct indexing scheme for 4-index 2-electron integrals.
Correct indexing scheme for 4-index 2-electron integrals.

It would have helped if I'd read my (rather helpful) comment in tri_ind
about the required ordering of the indices.  Previously the indexing
scheme for these integrals was using the opposite convention to that
required by tri_ind.  Chaos inevitably ensued.

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