Train Horns

Trains sound their horns when they pass each other and when they arrive at a station. A single global cooldown (default 120 seconds) keeps it from getting noisy. Change it in the mod settings when starting a game, or in content/train_horns_settings.lua for existing saves. Only trains near the camera honk, so the cooldown isn't spent on horns you can't hear. Choo choo :)