Massive (20x) speedup using bitpacking and removing some unnecessary selections out of the ply in merge_dupes.
Massive (20x) speedup using bitpacking and removing some unnecessary selections out of the ply in merge_dupes.

Also added intelligent interception of impossible queries.

dwinings/drop-hunter,dwinings/drop-hunter,dwinings/drop-hunter,dwinings/drop-hunter