Add fall damage

For reasons I can't fathom, if this portion isn't commented out, the AI completely fails w/ a weaponset of only firepunch. Something is seriously screwed up in RateShove, but after reading it many times, I still don't see it.

Variable pen width

tweak take 2

Small tweak to return something more useful in the negative 0 case on dX

Minimise another sqrt check.

Avoid local rate minimums around hog (within 15 pixels). Not tested.

Compatibility

Change rest of AI tests to floats, reenable snowball

Try adding it to deagle too. Although the routine still doesn't consider angle, so it'll pretty much be luck. Might be a waste of time. Also fix some neglected scores from before.

Hm. Score was a bit too much, AI was doing suicidal things.

small tweak. make drowning prefer higher health hogs

Teach AI to drown with shotgun too

Start on adding drowning bonus to bat/firepunch/whip. AI still is not smart enough to change direction when firepunching to face the water, or change the angle of the bat. Also try to weight cost of switches based on how many switches were available.

Add drowning to grenade too, try some little optimisations

Fix silliness

First pass at making AI drowning aware. No concerns of performance, only applied to bazooka (not bat/fp etc)

Minor optimisation for AI to cut down on hwSqrt calls

bug #336

Add div to allow safe integer division from lua

Recount team health if modifying hedgehog health

Set default empty ammo sets. Current mission handling appears to not pass any default ammo set, so script was never getting a chance to set its own.

Avoid rare double decrement.

Prevent pirate ship from repeating on Islands, remove vertical line in art landback

bug #370

Oh, should also check for game finish when player quits without ROUNDFINISHED message: small refactoring, not tested at all

comment out reserve to maintain old Qt compat

Also consider game finished when the last player reports ROUNDFINISHED despite the correctness parameter.