Make netty-buffer be quiet

I don't think failing to explicitly manage buffer lifecycle is high enough
up the list of performance problems to warrant dealing with.
Fix off-by-1 in calculating final sequence number
Be picky about quoted durations in the m3u8
Further comment clarification
Remove commented-out code
ANSI colouring for console output

Makes messages themselves stand out from the contextual information.
Apply same PES checks to ADTS as in place for H264
Validations of TS specific to to HLS segments