Changes

Defines all cargoes that player can transport in the game. Unique cargo is defined by Sii file and folder with one or more Sii files defining trailers which can carry this cargo. So for each cargo you have one Sii file inside "'''/def/cargo/'''" and one or multiple Sii files inside folder "'''/def/cargo/<cargo_name>/'''". Example definition for cargo: "'''<cargo_name>'''" is shown in the tree below.