[io] import base function for serialization at module level
[io] import base function for serialization at module level

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