Support for Autoplay and Mute options in applications

Adds support for autoplay and muted options passed into Applications:

var v = new ConcertVast();
var url = 'https://vast.com/vast.xml';
v.loadRemoteVast(url).then(e => {
  v.applyToVideoJs(vjs, {
    autoplay: true,
    muted: true,
  });
});