add COND_JUMP/CJMP_RESET_VAR (for Fatal Labyrinth)
add partial Quack Shot support, add FMDAC drum type, fix DumpDACSounds

- added NoteBase to SMPS_CFG struct, allowing notes to begin at values
  other then 80h (Quack Shot needs 61h)
- added VOL_QUICK/VQ_SET_4B_QS command for Quack Shot
- added MUS_PAUSE/MUSP_GBL_* and 4-byte PLAY_DAC commands for Mercs
- added FMDAC drum type for Mercs (includes handling in SMPS preparser)
- fixed DumpDACSounds writing the DPCM table more often than required