bugfixes
- When loading a fragment with missing frames, backtrack a segment to find the keyframe #917
- player get stuck after seek - Edge #951
improvement
- Webvtt support, along with 608/708 enhancements & bugfixes #922
- generate several distributions #934
- Feat/deliver level properties #975
- HLS + fmp4 support #970 (beta)
- Enhance short fragment detection #920