Autoequip

Further suggested changes to the autoequip.  Please accept some, none, or fewer of these.

- Let's equip guns before stun rods.  It appears since 0cf84e1f97258eaafa357f90d3b5a616c3469ecf 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.

- Units with a pistol can have a stun rod in their second hand.

- Place spare shells/rockets in backpack.

- Attempt to match heavier weapons to stronger dudes.

- Additional items such as grenades, flares, medikits, stun rods only added if unit does not become encumbered.

- Use ruleset to prioritise order in which items are assigned.