[io] try to simplify the management of multiple nslaw types
[io] try to simplify the management of multiple nslaw types

radarsat1/siconos,radarsat1/siconos,siconos/siconos,siconos/siconos,radarsat1/siconos,siconos/siconos,radarsat1/siconos,siconos/siconos,radarsat1/siconos