Add some more classes to the public API docs.  These are exposed to users, so we might as well explain how to use them.  Per complaint from ash at contact.bg.
Add some more classes to the public API docs.  These are exposed
to users, so we might as well explain how to use them.  Per complaint
from ash at contact.bg.

tivv/davepgjdbc,tivv/davepgjdbc