hygiene, in accordance to valid outputs just print two question marks for unknown intervals

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, extend interval tracking to full 16 tick types and track volume candles as well

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'cmd/info' into next

* cmd/info:
  minor, extend interval tracking to full 16 tick types and track volume candles as well
  hygiene, in accordance to valid outputs just print two question marks for unknown intervals
Merge branch 'next'

* next:
  minor, extend interval tracking to full 16 tick types and track volume candles as well
  hygiene, in accordance to valid outputs just print two question marks for unknown intervals