Fixed ammo bars in hud being positioned incorrectly if a weapon in the slot has no ammo.
Sentries now will also complain if the terrain is too steep or you're trying to deploy them in mid-air.
Adjusted protomag spin animation. Still not perfect but I tried my best.
Guess what: more PNG optimization.
Adjust SCUBA Gear autouse behaviour so it works properly with manual use.
Add 3D floor handling code on various things.
Increased size of Eightball explosions to match original game.
Fix invisibility playing no sound when activated.
