README.gh-pages

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

First install fork of pdoc from https://github.com/jswhit/pdoc (requires mako, 
markdown, pygments and future).

Then in netcdf4-python github clone directory (after building and 
installing github master),

* generate docs (sh create_docs.sh)
* copy docs/netCDF4/index.html up one level (cp docs/netCDF4/index.html ..)
* git checkout gh-pages
* cp ../index.html .
* git commit index.html
* git push origin gh-pages
* git checkout master