Unconstrained Parameters Shouldn't default to float if that the line is not in the specific spectrum

[eadkins333]

If the lineshape variable is not pressure constrained and not in that segment then the default should be not to float that value.

[eadkins333]

Change in Generate_FitParam_File class generate_fit_param_lielist_from_linelist

change unconstrained from dataset_min and dataset_max to spectrum_min and max

introduced new dataset definition that makes dictionary of the min and max wavenumbers for each spectrum.

[eadkins333]

-closed 8/22/2019