Log Message:
Update to 2.26:

30/12/2006  *** v2.26 ***

            - Uses DatLib v2.19.
            - Improved -dX modes (understands merging despite differing names)
            - Added CPS-2 to descriptions when producing disk supplements
            - Added sourcefile information to output datafile
            - Fixed sample functionality in the standard comparison modes.
              i.e. Running MAMEDiff without options or in verbose mode (-v).

11/07/2006  *** v2.25 ***

            - 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)