Update v 0.1.5 - Some improvements

I was focusing to work on the Player and the Mutants. There I was reworking and changing the animation, the behavior and the modell. From now on the head and arms of the mutants can be smashed. Player: I reworked the animations. Especially the animation when using the iron bolt. I also changed the Players modell and design. Mutants: While I was working on the Player I also worked on the Mutants. So, I also changed the mutants modell. And i reworked the animation of the mutants. Items: Some Items my cause damage to the player and the NPCs. Like Fire, Barbe Wire, Nuclear Water, ...