* DV handling was streamlined for both muxing/demuxing and
     decoding. All muxing/demuxing functionality is now available
     in libavformat/dv.[ch].

   * dv1394.c and avidec.c were hooked up with general DV demuxer.

   * DVAUDIO is dead! Long live pcm_s16le!

   * DV audio is now always recognized -- which means we can
     now hear all those ducks quaking in pond.dv.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@2319 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b