Update 2018-10-29: Gunner, sabot, tank!

• Added audible crew communication inside vehicles (work in progress)
• Long rods now shatter on extremely angled surfaces, reducing their effectiveness severely
• Commander sights can now be damaged in combat
• Commanders with separate sights will now focus on a secondary target and hand it off to the gunner when the gunner is ready
• Reduced volume of autoloader sound effects
• Increased difficulty of "Wasteland Hard" mission back to reasonable level