prioritize closing preview when ESC is pressed
foundation for playback component
group feature detection results in 'features' object, test for canvas and requestAnimationFrame
functional playback control for auto sliding
auto-slide playback updates, fix tap action, hide during overview
support moz and webkit prefixed requestAnimationFrame
minor tweaks and comments
add auto-slide instructions to readme
fix playback controls in ie10
fix css syntax error
replay when auto-slide controls are clicked on last slide
resume auto-sliding when autoSlide config value changes
don't show auto slide controls if there's only one slide
don't increase body height to try and hide address bar, caused issues in ios 7 safari
smooth reset of auto-slide progress, fix overlapping repaint calls
Merge remote-tracking branch 'remotes/hakimel-original/dev'

Conflicts:
	README.md
	css/reveal.min.css
	js/reveal.js
	js/reveal.min.js
whitespace police raid