Adds underground belt layering. !!!!NOW USES FACTORIO EXTENDED PLUS FOR HIGHER BELT TIERS!!!!
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
crashes with bob's logistics. "....Layerd-Belts/prototypes/functions.lua:92: attempt to index local 'belt' (a nil value)" in function "make_underground_entity"
