adding weights to biased counts
adding weights to biased counts

- now that counts are per-attribute rather than per-zone-attribute,
  group box attributes don't get counted as much
- when 'BOX' 'BOUNDS' are literals, bias against them more

ravichugh/sketch-n-sketch,ravichugh/sketch-n-sketch,ravichugh/sketch-n-sketch,ravichugh/sketch-n-sketch,ravichugh/sketch-n-sketch,ravichugh/sketch-n-sketch