add transparent texture and use by default for decals
push model label through to the models in a generic way
make CargoBody use ModelBase::SetLabel
LMR's crazy recursion isn't playing nicely. lets do this is in an even dumber way
Merge branch 'sgmodel-labels'
add missing issue refs to changelog
Merge remote-tracking branch 'robn/sgmodel-transparent-decal'
add min_crew and max_crew attributes to shipdef and expose to lua via ShipType