Changes

== Trailer Data ==

Trailer cargo definition files ("/def/cargo/<cargo_name>/<trailer.cargo>.sii") got two new array attributes **cargo_mass_ratio** and **cog_offset**. Cargo mass ratio array defines how cargo weight and forces are distributed among master and slave trailers (each array item is of type float). Additionally center of gravity array then defines offset of center of gravity in all directions (each array item is of type float3).