fixed bug in input layers selection
createTask and process method are consistent now
added capability of saving result layer in multiple SHP when input layers are DXF
fixed bug 667: exception when user dont select any layer to merge
fixed bug 608: user doesnt enter any result file to the geoprocess panel
result layer selection is congruent with AbstractGeoprocessPanel
Cambios ISchemaManager y IFieldManager por terminar
toString() added to Plugin interface to force textual representation of geoprocess plugins
first version in cvs