To update web docs at http://github.unidata.io/netcdf4-python:

First install pdoc (https://github.com/pdoc3/pdoc)

Then in netcdf4-python github clone directory (after building and 
installing github master), generate docs by running create_docs.sh.

Docs are put in docs/index.html.

Github pages (https://unidata.github.io/netcdf4-python/) points to docs/index.html
in master branch.
