Final Mod Pack 4.0

• New Forest map.
• New Port map.
• New Postindustrial map (by Dioxine).
• Rare Ethereals also enable psionics.
• Fixed Sandy Plains Alternative walking sounds.
• Fixed Auto-Cannon aimed range.
• Fixed Sectoid Combat Analysis article display.
• Fixed an issue with Muton Commander corpse recovery.
• Fixed some walls in Alien Base.
• Minor fixes.