bugfixes
- hls.js alternates 3 qualities on throttled connections #799
- version 0.67 does not dispatch ID3 tags (Hls.Events.FRAG_PARSING_METADATA) #794
- Clear out orphaned roll-up captions #802
improvements
- update abrEwmaFastLive to best value found during A/B testing
- update abrBandWidthFactor to best value found during A/B testing
- stream-controller: keep retrying loading fragment in auto-mode until level-controller switches down to level 0
- stream-controller: allow start level loading retry even if media not attached
- Initial live manifest size #789