Overlap in 1d is functional for arbitrary angular momentum values.
Next: working on contractions
Added in the exponential part of the prefactor in the 1D
integral expression. Now works for all seemingly arbitrary
centers for the gaussians as well.
Recognized that the overlap prefactor is the same prefactor used
in the binomal expression for the nuclear repulsion integrals.
Renamed the file and routines therein.
Kinetic Energy Integrals work uncontracted in 1 dimension.
Merge branch 'overlap'