4.1.2
update presentation examples move to root @ /examples
add data-auto-animate-id to auto-animate examples #2896
polyfill element.closest for ie11
fix broken asset urls in examples
v4.1.0
move highlight themes from lib/css/ to plugin/highlight/
move markdown example from /plugins to /examples
update math example to use 4.0 plugin syntax
bg videos remain muted on mobile, otherwise broken when navigating with swipe gestures