Trainer v1.5 Major update

Version 1.5 is here! This update includes lots of new fun features and a new build-from-the-ground train physics (no more frustrating no-crash situations, lol) Version new features: - Remodeled Train Physics (Frustration-Free) - TNT (hours of fun guaranteed) - New Menu categories - Lots of new stuff: downtown modular buildings, track pieces, huge mountains, animals. - New controller models (wrecking ball enabled!) - Arc teleport - Character animations - Performance improvements - And probably more things we don't remember right now