- Add indexing capabilities - setting "indexed" on a geometry should trigger the

  creation of a geospatial index on its table.
- Fix bug in that prevented setSRID(), setGeometryType() from working
  consistently
- Update shp2sql to create a new geo dataset and support the schema api rather
  than creating tables that aren't recognized or tracked by Drupal
- Adding geo_create_dataset() API function to facilitate the above.
- #648712 set default geo_type column GEO_UNKNOWN rather than GEO_SRID_DEFAULT.
  We don't know, obviously, so why not acknowledge that rather than making
  assumptions ;)