Updated it for use with IPython-dev HEAD, i.e. use SlidesExporter instead of RevealExporter.
If someone goes through the migration/ integration of nbconvert to IPython, and renames the 'RevealHelpTransformer' it will probably break again. 'SlidesHelpTransformer' might be worth a try.
http://nbviewer.ipython.org/6115366
https://gist.github.com/groakat/6115366