Enhance dirtygrid class to get full model spectra

[karllark]

the models results give the full spectrum
need to have a way to get this full spectrum via the dirtygrid class
will have to decide how to access/store this larger volume of results

[karllark]

Currently this is possible, but the spectroscopic data are scattered across many files (0.5 million?).
Need to copy all the spectroscopic data into a more compact format that can be distributed. May be one file for a few, but hopefully less than 0.5 million!