added GSS interaction data
GSS data now loads
GSS cross-section added
some fixes, v1.2 preliminary
function overloading for wt_poly_norm for simpler naming scheme
fixes, merged all poly_norms into one function
removed precalculated
fixed wt_poly_norm for one-temperature case
added GSS cross-section related headers
more GSS-related functions added
some GSS model notes
VV and VT integrals with GSS model added
GSS model added to dissociation integral calculation
NO diss energy update
fixes in VT-related functions (correct Morse potential depth calculation)
removed molecule_vibr_zero from VT-related functions
more GSL-MSVC notes
MSVC-related changes
MSVC-related changes
minor doc fixes