review img: better timecode label
allow page offsets, 10s per line
config for audio lines to own fn
cairo config fn for text labels
start axis break for periods of silence
timecode label printing own fn
improved timecode (min, hour, day)
squish axis for silent periods
with time squishing, no more need for row offset
review img: rgb->rgba
axis break lines
NOI level was not counting up consecutively