Spectral EoS parameters

While doing spectral EoS runs for 190425z, Les Wade discovered that the PESummary pages did not show the spectral parameters sdgammai, i = 0,1,2,3 and as an outcome they are not included in the output json file. See for example this for the parameter names https://ldas-jobs.ligo-wa.caltech.edu/~lwade/GW190425/local_runs/high-spin-maxmass_post/posterior_samples/posterior_samples.dat. For this case we resorted to using posterior_samples.dat, but PESummary should be updated to be able to parse the spectral parameters for future use. Thanks!