v0.7.1

Fixed

• Vibrance no longer flattens to neutral on a shell restart. The first
  nvibrant call of a session runs before the display count is known, so it
  passes no arguments — which sets every display to 0. The stored values are
  now compared against the table that call echoes back and re-applied when they
  disagree, instead of only returning the next time the panel was opened. The
  same comparison re-syncs after a hotplug.

Added

• Unit tests for Model.js, run with node --test tests/ against captured real
  nvibrant output.