bugfixes
- engine state transition WAITING_LEVEL to IDLE and vice versa infinite loop #769
- hls.js has deprecated code usage in chrome #784
- check for window.WebKitMediaSource #785
- Split codecs by space or comma instead of just comma #788
- Clamp 608 captions position between 0 and 100 #790
- Audio gap on fragment boundary for some streams #791
- JS Error when disabling 708 captions on video that has 708 captions #795