pubs: Let's have some pictures for P82.

There's a Skyloop example courtesy of Harriet Parsons.

The HARP before and after isn't the pair I intended, but I can't find the
images I retained for this purpose a few months back.
pubs: Add figures to the P82 paper.
pubs: Change sectioning in P82.

The paper covers more than Hikianalia.
pubs: Add Acknowledgments and the URL of the Starlink Release web page.
pubs: Take out the question about distorted TAN.

Also correct a typo in the same sentence.