Add a simple MPEG4 ES parser.

Add a simple MPEG4 ES parser.

Original commit message from CVS:
2007-10-26  Julien MOUTTE  <julien@moutte.net>

* configure.ac:
* gst/mpeg4videoparse/Makefile.am:
* gst/mpeg4videoparse/mpeg4videoparse.c:
(gst_mpeg4vparse_drain),
(gst_mpeg4vparse_chain), (gst_mpeg4vparse_sink_setcaps),
(gst_mpeg4vparse_sink_event), (gst_mpeg4vparse_cleanup),
(gst_mpeg4vparse_change_state), (gst_mpeg4vparse_dispose),
(gst_mpeg4vparse_base_init), (gst_mpeg4vparse_class_init),
(gst_mpeg4vparse_init), (plugin_init):
* gst/mpeg4videoparse/mpeg4videoparse.h: Add a simple MPEG4 ES
parser.