Ureshf remake

Big Picture Goal: Remake the uResHF method with matrix-adjugate stability formulation

• Starting over from scratch due to previous uResHF branch's merge with master being more trouble than it's worth
• Still expect bugs from The Shadow Bug to persist at the end of this work
• Initial guess routines assume that pre-requisite SCF calculation will produce restricted orbitals as input

Coding work checklist:

• Initial guess generation from HF and orbital rotation
• Allow for singlet, triplet multiplicity specification from user-input
• Completed implementation of everything in resmf/ureshf.cpp surrounding fockbuilder routine
• Completed implementation of fockbuilder routine in resmf/ufock.cpp
• Add regression test cases
  • triplet ground state of water with SS-uResHF
  • convergence of HF + dbl excitation wavefunction of SA-uResHF for water and ethene
• Add print KAB debugging flags (to allow for comparison of ResHF and uResHF methods)
• Add finite difference fock check debugging routine in main.cpp

Open issues still needing addressed:

• Need to recover and "memorialize" the HAB and |SAB| validation work done previously

Related to issue #1 Task C