Added support for sound groups.
Revert "Added support for sound groups."

This reverts commit 5e03354c2b38e9cb9853547c986778e8a464ef62.
Merge branch 'master' of https://github.com/jokigenki/Foxtrot

# By Tim Frost
# Via Tim Frost
* 'master' of https://github.com/jokigenki/Foxtrot:
  Intersticial gfx added back in
Added support for sound sets.
Added extra fart sounds.