Voxel Trains IR

This update improves some existing models and adds some major new trains, notably the ICE 3 MS (BR 407), Stadler Giruno (RABe 501), Siemens Vectron, and FEF-1. We also added tons of new tracks and improved buffer stop behavior. In addition to that, it fixes the issue of trains with custom GUIs instead just having no GUIs.