ext/raw1394/gstdv1394src.*: Added conversion/query functions.

ext/raw1394/gstdv1394src.*: Added conversion/query functions.

Original commit message from CVS:
* ext/raw1394/gstdv1394src.c: (gst_dv1394src_get_type),
(gst_dv1394src_base_init), (gst_dv1394src_class_init),
(gst_dv1394src_init), (gst_dv1394src_dispose),
(gst_dv1394src_iso_receive), (gst_dv1394src_discover_avc_node),
(gst_dv1394src_change_state), (gst_dv1394src_get_event_mask),
(gst_dv1394src_event), (gst_dv1394src_get_formats),
(gst_dv1394src_convert), (gst_dv1394src_get_query_types),
(gst_dv1394src_query), (gst_dv1394src_uri_get_type),
(gst_dv1394src_uri_get_protocols), (gst_dv1394src_uri_get_uri),
(gst_dv1394src_uri_set_uri), (gst_dv1394src_uri_handler_init):
* ext/raw1394/gstdv1394src.h:
Added conversion/query functions.
Update buffer timestamps,
Added signals.
Added uri dv:// so it might play from the firewire in playbin.
Fix a possible leak.
Added debugging.