BA: add rudimentary enemy prediction, w/o causing anything to happen yet
- move ThreatRange to commonfunctions
- add tacticalhandler to predict enemy positions
- change many commands to CustomCommand
- make targethandler pass around tables of unit info w/ unitIDs, not IUnits
- remove lvl2 storage (it's always a waste, right?)
- remove tacnukes from taskqueues (until a decent way to target blobs of units)
- fix assisthandler.lua bug
- scale distance away a builder will go to build something with building cost