ALMA feature request: SODA queries

[keflavich]

@andamian ALMA supports SODA subsetting (https://almascience.nrao.edu/soda/). I'd like astroquery to support it. The setup seems very complicated using existing machinery, but entirely possible.

Let me know if you're available to talk about this - I have a working example from Felix, but I don't yet understand how it fits with the astroquery vo data.

[andamian]

@keflavich - what is SODA subsetting? cutouts? Yes, I am available. We can try to hook up on astropy slack maybe. If you can send me the example from Felix, I would have time to think about it.