(da big courmischage)

* modules/video_output/opengl.c: new platform independant OpenGL vout (uses an "opengl provider" module).
* modules/visualization/galaktos/*: uses the new "opengl provider" module.

   simple interface to create and use OpenGL windows
 * modules/video_output/x11/glx.c: the GLX vout now implements the
  "opengl provider" interface
 * modules/visualization/galaktos/*: no more dependency on GLX: we use
   the generic opengl provider interface instead.

    based on ProjectM (xmms-projectm.sourceforge.net), without the
    dependency on SDL 1.3. At the moment it only works on X11 with GLX 1.3,
    I didn't manage to have it working with the 1.2 API :(
    SGI Pbuffers are not used yet, I didn't manage to have them working
    well either :(
    Milkdrop presets are searched in /etc/projectM/presets (guess why ;)
    With projectM presets, colours look a bit "flashy", I wonder if it
    is normal...
    To compile the plugin, add --enable-galaktos in configure. The only
    dependencies are on X11 and OpenGL libs.
    Enjoy !

   with MilkDrop for winamp.

  skins are not reentrant (at least with x11). Put commands in the queue
  instead.
  * commands/cmd_vars: commands to change variables
  * controls/ctrl_list.cpp: automatic scroll when the stream changes
  * src/bitmap.cpp: removed the scandinavian characters from the
    text font, they don't belong to ASCII (caused a stack corruption)

  win32, by ipkiss and myself...
 Among the features:
 - framework rewritten from scratch, heavily based on design patterns
  => new controls can be (hopefully) created more easily, portability
  to other OS is better, and the interface is less dependant from
  the vlc core
 - new concept of "layout", to provide a window with several different
  views (as in winamp3 skins)
 - controls can now be placed at a relative position to the edges of
  a window, which allow controls and layouts to be resizable (e.g
  for the playlist window)
 - Use of libpng and libfreetype2 for better portability between x11 and
   win32 => ttf fonts and antialiasing
 - New DTD for the xml theme ( *it will probably change again* )
 - Very very beginning of scripting in the xml file
 - And many things I miss
 - And probably many bugs ;)

some cleanup.