layout and initial value fixes.

  (should fix IPv6 error reporting on Win32)
- Some cleanup

   slide-show.

bookmarks : remove compile warning

   and height while keeping the aspect ratio of the original picture. New
   options to deinterlace the picture on loading.

   (for instance deinterlace filter).

   checks for frequencies and bitrates in MPEG audio.

   order to get the file extension.

   because the new location doesn't exist.

   We cannot do better (i.e. save the position when the window is minimized)
   because we cannot be notified of such event with the wxWindows API.

  (closes #270)
- strlen( static string ) => sizeof
  using strlen with static strings is lame

Still needs much work
example command line :
./vlc -vvv --color --sub-filter rss --rss-urls "http://kernel.org/kdist/rss.xml,http://fxfeeds.mozilla.org/rss20.xml

 * motiondetect.c : propset ... Id

- Support IP6 (refs #270)