bugfixes
- stream-controller: fix maxNudgeRetry limit not taken into account
- fix demo page not working on old browsers (not supporting arrow functions)
- v0.6.16 + Opera/Vivaldi + b-frame pyramid + audio does not play #912
improvement
- abr-controller: in heuristic mode (startLevel=-1) cap maxLoadingDelay by first fragment duration
- run functional tests against more browsers / streams