sys/directdraw/: Prepare the plugin to move to good:

sys/directdraw/: Prepare the plugin to move to good:

Original commit message from CVS:
* sys/directdraw/gstdirectdrawplugin.c:
* sys/directdraw/gstdirectdrawsink.c:
* sys/directdraw/gstdirectdrawsink.h:
Prepare the plugin to move to good:
Remove unused/untested code (rendering to an extern surface,
yuv format rendering).Use GST_(DEBUG/*)_OBJECT macros
Rename all functions from gst_directdrawsink to gst_directdraw_sink.
Add gtk doc section
Fix a bug in gst_directdraw_sink_show_frame, memcpy line by line
respecting destination surface stride.
* sys/directsound/gstdirectsoundplugin.c:
* sys/directsound/gstdirectsoundsink.c:
* sys/directsound/gstdirectsoundsink.h:
Prepare the plugin to move to good:
Rename all functions from gst_directsoundsink to gst_directsound_sink.
Add gtk doc section
* win32/common/config.h.in:
* win32/MANIFEST:
Add config.h.in