Transport Fever 2 - More Cargo Demands as City Grows

IMPORTANT: incompatable with any mod that modifies townbuildingutil.lua

This mod makes it so as a city grows, additional cargo types are demanded from higher capacity buildings.

This mod works by looking at building capacity (which is basically the population of that building). larger capacity buildings grow in higher pop cities. At 10 and 20 capacity industrial buildings a new cargo will appear. At 15 and 30 capacity commercial buildings a new cargo demand will appear. Numbers subject to change.

Special thanks to FxUK for the original mods that created more cargo demand in cities. Those mods were key in finding the code needed to make this possible.

Authors: mav12222