added dirty fix for NaN _nextOutputTrailingLoudness
Merge remote-tracking branch 'upstream/master' into quick_audio_PR
removed Audio.cpp initialization list warning; updated Injector removal conditions
made stats easier to read; reverted injected stream deletion conditions
removed debug code in AudioMixer
moved some const defs to avoid redefinition
updated domain page stats to use formated usec time strings
merge with upstream
Merge pull request #3166 from wangyix/quick_audio_PR

Made audio timegap stats more readable with varying units; Fixed AudioMixer NaN error on WIndows;