* DirectX enhancements by Gildas Bazin, such as software rendering.

  * DirectX enhancements by Gildas Bazin, such as software rendering.
  * Merged dvdcss_init and dvdcss_open into dvdcss_open, and dvdcss_close
    and dvdcss_end into dvdcss_close. libdvdcss API now has 7 functions.
  * Another failed attempt at profiling vlc under Linux: ported the
    threads API to GNU Pth. Activate with --enable-pth. It doesn't seem to
    spawn new threads for me, maybe someone will have better luck.
  * Makefile optimizations.
  * Automatic build of libdvdcss if not found.