fixed issue with dependency loader failing when there were 0 async sc…

…ripts (hakimel#214)

remove sharing code for sample presentation

clean up initialization, conditionally load classList polyfill prior …

…to reveal.js

comments, tweaks and a new slide highlighting mobile support

better example of state usage

readme history update

Merge pull request hakimel#5 from matthewlein/master

contenteditable and arrow keys

before rename & rewrite