Merge branch 'v4.4_update' into 'poul'

README.md

css/print/paper.scss

css/print/pdf.scss

css/reveal.scss

demo.html

dist/reveal.css

dist/reveal.esm.js

dist/reveal.esm.js.map

dist/reveal.js

dist/reveal.js.map

examples/auto-animate.html

index.html

js/controllers/autoanimate.js

js/controllers/backgrounds.js

js/controllers/notes.js

js/controllers/print.js

js/controllers/slidecontent.js

js/reveal.js

js/utils/constants.js

js/utils/device.js