Code review comment for ~anj/epics-base/+git/base-7.0:typed-dsets

Merged José's Codeathon work into this branch (he converted all of the other record types and their device supports), then added some finishing touches and other documentation adjustments. I believe this is now ready to merge, but I haven't tested it with external source code. I did bump the minor version number for the database module, to 3.18.0.