Configure shellinabox to spawn screen, rather than vi
Remove useless id attribute
Add section on qrcode.js
Add section on GitHub
Add shellinabox iframe for reveal.js
Add information on Git submodules
Add OSCON logo
Add parallax background image to index.html

Commented out for the time being, to be re-added while presenting.
Trim OSCON logo
Swap heading types
Merge branch 'master' into gh-pages