Adds 5 NPCs RNG textures (the game randomly chooses different skins for the same model):
-Antlion - 2 skins (2002 and 2003)
-Combine soldier - 2 skins (2002 and 2003)
-Headcrab - 2 skins (2002 and 2003 taken from my previous work)
-Citizens - 2 skins (Type 1 and Type 2)
-Manhack - 3 skins (2001, E3 and 2003)

Bugs: When killing a zombie, headcrab can jump out from his head with different texture.

The author is VanderCold

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