Adding a first version of directfbvideosink.

Adding a first version of directfbvideosink.

Original commit message from CVS:
2004-11-28  Julien MOUTTE  <julien@moutte.net>

* configure.ac:
* ext/Makefile.am:
* ext/directfb/Makefile.am:
* ext/directfb/directfbvideosink.c: (gst_directfbvideosink_create),
(gst_directfbvideosink_get_pixel_format),
(gst_directfbvideosink_get_format_from_fourcc),
(gst_directfbvideosink_fixate), (gst_directfbvideosink_getcaps),
(gst_directfbvideosink_sink_link),
(gst_directfbvideosink_change_state),
(gst_directfbvideosink_chain), (gst_directfbvideosink_buffer_free),
(gst_directfbvideosink_buffer_alloc),
(gst_directfbvideosink_interface_supported),
(gst_directfbvideosink_interface_init),
(gst_directfbvideosink_navigation_send_event),
(gst_directfbvideosink_navigation_init),
(gst_directfbvideosink_set_property),
(gst_directfbvideosink_get_property),
(gst_directfbvideosink_finalize), (gst_directfbvideosink_init),
(gst_directfbvideosink_base_init),
(gst_directfbvideosink_class_init),
(gst_directfbvideosink_get_type), (plugin_init):
* ext/directfb/directfbvideosink.h: Adding a first version of
directfbvideosink.
* sys/xvimage/xvimagesink.c: (gst_xvimagesink_init): Initializing some
more.