New config:  houseCoupon UPC prefix is configurable via the Scanning page in /install
Models for POS translog tables
Commenting out alog/activitylog/activitytemplog and marking them
deprecated. Barring objections they'll be removed in the near
future as unused database cruft.
Merge remote-tracking branch 'origin/hcprefix' into develop

Conflicts:
	pos/is4c-nf/lib/Scanning/SpecialUPCs/HouseCoupon.php