Added Scarab enemy

Enemy behavior fixes for high distance.

Added Camo elite spec ops variant (yes, they are actually invisible, with same HALO-like render camouflage)

Change in behavior for the elites, brutes, drones, shield jackals and grunts. They will attack while they are move more often.

Sword elites now has lights on their sword,

Fix for suicide grunts, now they are exploding and dying correctly, their attack now fixed (To invoke this state you have to change the state of enemy from Default to Default_kamikaze). Ultra grunt may survive first explosion which means this enemy could blow up twice.

Added collision fix for regular variant of shield jackals, soo you can now shot their hand with pistol like on CE variants.

Added shields for the Drone Captain.

Fixed enemy projectiles that collides with player projectiles and destroy it mid fly.

Fixed sword elites looking at target toes when they perform melee attack. (Against enemy that the same height with elite or kind of, they are still looking down to stab the spiders.)