Added https prefix to slideshare iframe link, without this I got a 'not found' error when opening the demo locally.

-webkit- stuff only works on webkit browsers.  I'm pretty sure that using the standard `transform:` here works in most modern browsers.

merge upgrade of highlight.js, add base styles to pre code, dont limit language detection in index.html #809

For the Moon and Solarized themes they had .css appended to them which was causing them to not come up.