Switched Impaler fire sound to something more appropriate (proto Skaarj fire).
Add slot priorities to all weapons, final weapons come first.
Adjust hud behavior to properly draw ammo bars by the order of their weapons.
Assigned all pickup models.
Implemented all ammo types.
Finished Flak Cannon.
Additional cleanup.
Slot reassignments and other adjustments to match known Unreal prototype info.
