Fek - Rack 2 Version 0.2.12

Hey folks! Found and fixed the magenta bug / missing shader issue. Turns out the latest Unity update changed the way that shaders get packaged up, and some vital shaders weren't being included.
- The new "tiptoe" system is finished and functional. This system has to do with the way bondage devices are raised or lowered to accomodate differently-sized characters. Before, each interaction had a hardcoded value, and these hard-coded values tended to fail at extreme size differences. The new system is interaction-agnostic: it reads the performing character's current position to determine whether the apparatus should be raised or lowered, based on how they're squatting, tiptoeing, scrunching or stretching their neck or arms, and a few other similar factors. This system is mostly functional and polished for many factors, but still needs a little cleanup / magic, especially when detecting awkward head angles (like licking the feet of a subject on a rack chair that's particularly low to the ground).