v0.2.5, 2006-04-23:
  New channel effect: P, fine pitch setting
  New instrument sequence editor
  Added option to create PRG-ROM files that can be burned directly on a 32 kB ROM
  Window position are remembered
  Fixed a DPCM sample assignment bug
  Fixed a MML reader bug and made it possible to read relative MML strings
  Fixed noise and DPCM note-offs bug in NSF
  Optimized the NSF writer: bigger songs will fit into NSF's
  Rewrote big parts of the source, some bugs was eliminated
  Changed the 'write binary' to output DPCM samples in a separate file
  A few other various bug-fixes