Adding some changes before I convert this to allow bring in subsample
data only.
esq_constuct_ukln.py has been converted to have the consts class which
houses the objects for the energy calculation. Pre-Subsampled input is
now accepted as well (and prefered). Subsampling is mandated for
non-subsampled states. Energies have been rerun and sanity matrix (check
to see that the linear basis do reconstruct the energy) now agree to
0.00000 kJ/mol, was previously 1.023, probably from failed rerun in ions
0-11.