Log Message:
Update to flac 1.0.4.  Notable changes:
flac:
- AIFF input support
- vorbis tag addition whilst encoding (-T)
- various speedups, reductions in memory use, and minor fixes

libraries:
- OggFLAC & OggFLAC++ libraries
- various speedups, reductions in memory use, and minor fixes

(see doc/html/news.html for more info)