Add GEOMETRY_EXTRACT_TYPE configuration to specify the geometry extrating mode: WKT (default), WKB and INTERNAL. The last one is a pure perl implementation of the WKT extration developed for Ora2Pg.
Remove USE_SC40_PACKAGE directive and any reference to this library, it is not useful now that we have the INTERNAL geometry extration mode.
Add a pure perl library to export SDO_GEOMETRY as a WKT representation and a new type of extraction INTERNAL to use it instead of the two other type WKT and WKB which use the Oracle SDO_UTIL.TO_WKBGEOMETRY and SDO_UTIL.TO_WKTGEOMETRY function to extract data.