Changes

Trailer cargo definition files ("/def/cargo/<cargo_name>/<trailer.cargo>.sii") got two new array attributes **, '''cargo_mass_ratio** ''' and **'''cog_offset**'''. Cargo The 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 , the center of gravity array then defines offset of center of gravity in all directions (each array item is of the type float3).