[io] vview, remove immediate mode rendering (speed improvement)
[io] vview, remove immediate mode rendering (speed improvement)

     + add global-filter option for just one actor, unfortunately
       vtkCompositeDataGeometryFilter has many drawbacks, one of them
       being the speed...

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