ext/ogg/gstoggdemux.c: Annodex support in ogg demuxer. Doesn't do very much without the other annodex patches (to come).

Original commit message from CVS:
* ext/ogg/gstoggdemux.c: (gst_ogg_pad_parse_skeleton_fishead),
(gst_ogg_pad_parse_skeleton_fisbone), (gst_ogg_pad_query_convert),
(gst_ogg_demux_chain_peer), (gst_ogg_pad_submit_packet),
(gst_ogg_demux_perform_seek), (gst_ogg_demux_read_chain),
(gst_ogg_demux_read_end_chain), (gst_ogg_demux_collect_chain_info),
(gst_ogg_demux_change_state), (gst_annodex_granule_to_time):
Annodex support in ogg demuxer. Doesn't do very much without the
other annodex patches (to come).