Add DeaDBeeF support

DeaDBeeF (as in 0xDEADBEEF) is an audio player for GNU/Linux systems with X11 (though now it also runs in plain console without X, in FreeBSD, and in OpenSolaris).

Main features (the list is most likely far from complete):

    * mp3, ogg vorbis, flac, ape, wv, wav, m4a, mpc, cd audio (and many more)
    * sid, nsf and lots of other popular chiptune formats
    * ID3v1, ID3v2.2, ID3v2.3, ID3v2.4, APEv2, xing/info tags support
    * character set detection for non-unicode id3 tags - supports cp1251 and iso8859-1
    * unicode tags are fully supported as well (both utf8 and ucs2)
    * cuesheet (.cue files) support, with charset detection (utf8/cp1251/iso8859-1)
    * tracker modules like mod, s3m, it, xm, etc
    * HVSC song length database support for sid
    * gtk2 interface with efficient custom widgets
    * no GNOME or KDE dependencies
    * minimize to tray, with scrollwheel volume control
    * drag and drop, both inside of playlist, and from filemanagers and such
    * control playback from command line
    * global hotkeys
    * multiple playlists
    * album artwork display
    * 18-band graphical equalizer
    * metadata editor
    * user-customizable groups in playlists
    * user-customizable columns with flexible title formatting
    * radio and podcast support for ogg vorbis, mp3 and aac streams
    * gapless playback
    * plugin support; bundled with lots of plugins, such as global hotkeys and last.fm scrobbler; sdk is included
    * duration calculation is as precise as possible for vbr mp3 files (with and without xing/info tags)
    * was tested and works on x86, x86_64 and ppc64 architectures. should work on most modern platforms

http://deadbeef.sourceforge.net