Website - http://lab.hakim.se/reveal-js/#/
GitHub - https://github.com/hakimel/reveal.js/
Add ?print-pdf#
to the url
file:///C:/Users/jlant/jeremiah/me/presentations/2015-08-19-osw-flood-mapping/index.html?print-pdf#/
or
use decktape (https://github.com/astefanutti/decktape) - a PDF exporter for HTML presentation frameworks
$ cd <into your presentation>
$ python -m http.server
$ cd <to decktape directory>
$ ./bin/phantomjs decktape.js reveal http://localhost:8000/\#/ mypresentation.pdf
or
$ ./phantomjs.exe decktape.js reveal file:///C:/Users/jlant/jeremiah/me/presentations/2016-08-24-flood-inundation-hazard-ky-kamm/index.html 2016-08-24-flood-inundation-hazard-ky-kamm.pdf