Merge branch 'master' of github.com:sampotts/plyr

# Conflicts:
#	demo/dist/demo.css
#	dist/plyr.css
#	dist/plyr.js.map
#	dist/plyr.min.js
#	dist/plyr.min.js.map
#	dist/plyr.polyfilled.js.map
#	dist/plyr.polyfilled.min.js
#	dist/plyr.polyfilled.min.js.map

Merge branch 'develop'

Merge pull request sampotts#975 from sampotts/develop

v3.3.8

* Vimeo fixes for mute state

*   Vimeo ID fix (fixes sampotts#945)
*   Use `<div>` for poster container
*   Tooltip fixes for unicode languages (fixes sampotts#943)

Small bug fixes

* Now using a custom poster image element to hide the YouTube play bu…

…tton and give more control over when the poster image shows

*   Renamed `showPosterOnEnd` to `resetOnEnd` as it makes more sense and now works for all players and does not reload media
*   Fix for same domain SVG URLs (raised by Jochem in Slack)
*   [`URL`](https://developer.mozilla.org/en-US/docs/Web/API/Window/URL) is polyfill now required
*   Added pause className (fixes sampotts#941)
*   Button height set in CSS (auto) (fixes sampotts#928)
*   Don't autoplay cloned original media (fixes sampotts#936)
*   Return to the home menu pane after selecting an option