Log Message:
Update to 0.23:

shared-mime-info 0.23 (2007-12-18)
* Mime-type Changes:
- Add QTIF QuickTime image
- Add SDP stream description
- Add Vala source file
- Add Atom feed, OPML
- Add SAMI, MicroDVD, MPSub, SSA subtitles
- Add audio/x-m4b as a sub-class of audio/mp4
- Add *.aac as a suffix for MPEG-4 audio files
- Add Compressed Flash detection, add FutureSplash support
- Add *.asc as a suffix for PGP armoured keys
- Add application/msword as a sub-class of application/x-ole-storage
- Don't associate *.htm and *.html to Mozilla bookmarks
- Add more aliases for PowerPoint and Word mime-types
- Add *.vlc as a suffix for m3u files
- Better magic for Word and Office documents
- Split Windows Media Station playlists from ASX ones
- Fix up JPEG 2000 mime-types
* Other:
- Add a testsuite in the CVS tree