Add a godoc reference to delegate indexing and references
to that service, thus keeping our library and usages upto date,
instead of relying on generated markdown that goes stale
especially for changing API signatures, and becomes tedious
where someone has to remember to always regenerate the README
markdown and then commit it.
Fixes#24
Ethan Buchman
Max Levy
Liamsi
vrde
Jae Kwon
Anton Kaliaev
Emmanuel Odeke