LV-426 overhaul update.

Alien AI and Weapons improvements.

BIS audio update, fixed sound loop triggers.

Facehugged Marine visor removed.
Objective 1 Radio text messages delay MP bug fixed.
Objective 5 Queen Alien health reduced and much easier to kill.

Objective 5 trigger event typo P11, fixed to P1.

Trigger has been expanded to prevent the right turn accident as well, all fixed.

Locked destroyed APC's. SP and MP bug when entering vehicle and not able to exit the vehicle. Fixed.

Fixed missing WY logo, added extra explosives inside APC's and explosive box. Fixed uniform glitch inside stasis tube, and added extra teleport trigger for objective 3.