- add qsort and bsearch to find_cat() (find.c) (speed)
- where option ( update only records selected by where )
- check imput parameters
- check column datatypes
- load to DB point, line, area coordinates in Open GIS format. 
  requires:
  - some Open GIS library (find or write, see 
    src/libes/vect32_64/shapelib-1.2.8/contrib/shpgeo.c)
  - add binary type to dbmilib dbValue structure