Add support for AAC audio in AVIs.
Add support for AAC audio in AVIs.

MaddTheSane/perian,JanX2/Perian,JanX2/Perian,MaddTheSane/perian,JanX2/Perian,MaddTheSane/perian,MaddTheSane/perian,MaddTheSane/perian,JanX2/Perian,MaddTheSane/perian,JanX2/Perian