Import YAML data derived from the HiPS list

These data files are generated from the HiPS list and put into a
convenient, line-oriented text format. By tracking them in this repo, we
can review changes from when the HiPS list updates and fix up any
metadata issues before generating the final WTML.

toc.txt

@@ -1,4 +1,4 @@
-updated: 2021-12-16T15:16:37.982340
+updated: 2021-12-16T17:44:46.079170
 
 CDS/B/denis/denis	The DENIS database (DENIS Consortium, 2005) (denis)
 CDS/I/252/out	The USNO-A2.0 Catalogue (Monet+ 1998)