Improve mcmanage report
Fix errors and show missing files in mcmanage report
Improve verbage in report
Fix mangling issues and re-enable js mangling
Merge branch 'master' into libjass
Add captionator.js for WebVTT subtitles

Since we convert SRT to VTT, this will also work for VTT subs.
Revert "Fix mangling issues and re-enable js mangling"

This reverts commit e8d9aadb41fb7e3ead664dfdecdb6b8e45bf4850.
Merge branch 'master' into libjass
Render srt/vtt subtitles on video