Log Message:
Update to 2.31:

01/01/2007  *** v2.31 ***

            - Uses DatLib v2.20.
            - Added 'prune' option (-p) for removing roms, disk and/or samples
            - Added 'incorporate' option (-I) to assist in combining datafiles

17/10/2006  *** v2.30 ***

            - Uses DatLib v2.18.
            - More intelligent DTD creation when saving in ListXML format
            - Added support for game/display (MAME v0.107)
            - Added support for game/input/control (MAME v0.107)
            - Added support for emulator/build (MAME+MESS v0.101u4 upwards)
            - Added support for driver/savestate (MAME v0.101u1 upwards)
            - Note: The above changes affect the tab delimited format!
            - Added 'delimited.sql' as an example of loading dats into MySQL

16/07/2006  *** v2.29 ***

            - Uses DatLib v2.17.
            - Fixed bug that caused the DatUtil -g and -r options to crash

11/07/2006  *** v2.28 ***

            - Uses DatLib v2.16.
            - Fixed bug that messed up internal indices (affected crc matching)
            - More intelligent directory scanner (regarding samples and CHDs)
            - Removed 64MB file limit from directory scanner (reads 1MB blocks)