bugfixes
- Add missing undefined DefaultConfig properties #697 #698
- Error using hls.js with the audio tag in combo with live hls stream #682
- fix video decode error on streams with PES packet overlapping between TS fragments #696
- Chrome dropping audio frames on live streams encoded by Apple's mediastreamsegmenter #626
- multi-audio issue - no audio after couple of switches #695
- Ensure no runtime errors are raised when a playlist is empty