OCC warn users that analytic gradients are NOT available for SCF_TYPE=DF/CD
OMP2 command calls DF-OMP2 if SCF_TYPE=DF/CD for energy computations. DF-OMP2 select default DF_BASIS_SCF and DF_BASIS_CC if they are not provided.
Warning that SAPT code evolved (and exact results changed) over the years.
Merge branch 'master' of https://github.com/psi4/psi4