PneumaticCraft: Repressurized

Added

• There is now a dense black fog effect rendered when player's head is in a Crude Oil fluid block

Fixed

• Stopped the Pneumatic Armor Magnet upgrade working in spectator mode
• Drones no longer drop items with Vanishing Curse when they die
  • Exception: such items will still be dropped if the drone is wrenched by the owning player (and only the owning player)
• Fixed a race condition when using Computercraft to control Air Cannons