Autoequip

Further suggested changes to the autoequip.  Please accept some, none, of fewer of these.

- Let's equip guns before stun rods.  It appears since #0cf84e1f97 are troops have become way too pacific.

- Let's distribute spare clips fairly: units that already have a spare clip anywhere about their inventory do not get an extra one.  Currently, if the spare is not in the correct belt slot, autoequip is putting another spare in there, meaning units at the back of the queue are in danger of not getting their fair share.