Ready for now.sh

This release adds a few tweaks here and there to make auditorium render generate now.sh compatible source. This has allowed us to move the demo over to auditorium-demo.now.sh and released us from the burden of manually hosting a working version of the demo.

This also means that now, by look at demo/now.json you can get a pretty good idea of how to setup a static version of your slideshow that works in now.sh with backend included.