Added missing fuel outlets
Improvements to ammo API, added a new ammo type

Weapon:
DefineItemTypeWeapon (in ScavengeSurvive.pwn) now uses un-tagged
floating point values for "koprob" (knockout probability).

Knockout chance values throughout the code are now represented as a
[0.0-1.0] bounds multiplier.

Ammo type definitions now have a name which denotes the type of ammo
(not calibre or item name), a bleedrate multiplier and a knockout chance
multiplier. This means different ammo types of the same calibre can
affect the bleedrate and chance of knockout. A new ammo type has been
added to test/demo this functionality, with a 1.2 bleedrate multiplier
and 0.5 knockout chance multiplier (faster bleeding but less chance of
knocking out).

Addressed issues with weapon and ammo item names, they now display the
amount of ammo, calibre and ammo name in menus.