gst/qtdemux/qtdemux.c: Added codec recognition for: _ VP31 : video/x-vp3 _ AVDJ : image/jpeg _ dvcp, dvc  : video/x-d...

Original commit message from CVS:
* gst/qtdemux/qtdemux.c: (qtdemux_parse_trak),
(qtdemux_video_caps), (qtdemux_audio_caps):
Added codec recognition for:
_ VP31 : video/x-vp3
_ AVDJ : image/jpeg
_ dvcp, dvc  : video/x-dv, systemstream=(boolean)false
_ 0x6d730017 : audio/x-adpcm, layout=(string)quicktime