Added Mangler, George, and Krasny Soldat models/assets.

Thing-a-ma-bobs

Its very clear some of you don't read the patch notes... If you see this, please comment "Chicken Nuggets" down below.

Me when particles

All Chron Zombies now have facial animations, obviously doesn't work in the current nZR version right now.
The other BO3 zombies will be pain to do... Curse Treyarch for making the facial bones for original map models.

All currently existing BO4 and Cold War zombie models have been given animations for their faces.

WW2 Zombies have been given a majority of anims they've been missing compared to the 3arc Zombies.
The Bomber Zombie's bomb model has finally been fixed and has proper functioning skin groups.

Edits to existing models and more animations.

Panzer animation tweaks

Tweaked both Panzer Soldat models and made a animbase for the Panzers to allow for easier animation tweaking.