fix attackcounter overcompensation

- update unittable and featuretable to BA 7.91
- fix tech level attackcounter inflation (-1)
put extra featuredefs back in
Merge remote-tracking branch 'upstream/master'
fix typo
fix and improve defender behaviour
fix defenders not rushing to threatened buildings
give commander less defender priority
make defenders guard in a more aggressive formation
BA: improve defender behaviour, lvl2 raid/battle priorities, bombard build
- reduce enemy units within range requirement for building bombarders
- reduce combat unit requirements for building bombarders
- switch priorities for lightning tank / bulldog production: build lightning tanks only when sufficient bulldogs exist, not the other way around (lightning tanks are not very effecient)
- allow defenders to go after attackers that are a bit of a distance from threatened buildings
- use guard command to move defenders near defendee before they're 500 away
- don't rush to defend scouts
- don't run away when hit unless below a certain health threshold
BA: prioritize closer attack spots, restrict storage building
- fix defendhandler crash due to nil internal unit
- prioritize attack positions closer to attack squad
- smaller lvl1 converter and storage build limit
- increase resource requirements to build storage
Merge pull request #39 from zoggop/master

fix typo and BA: fix attackcounter, update unittable to 7.91