+ improved spu_SortSubpictures() to deal with SPU channels.
  + ephemer subpictures can also have a stop date now (allows more flexibility).

* modules/stream_out/transcode.c: new sfilter option for using subpictures filters during the transcoding.

* src/libvlc.h: new --sub-filter config option + added a new subpictures category that regroups all the subpictures options.

* modules/stream_out/description.c: bug fix.

* modules/gui/wxwindows/menus.cpp: re-organized right-click menu + play/pause/stop/next/previous entries.

* modules/stream_out/description.c: new "description" stream output module which gathers information on elementary streams (pre-parsing).
* src/misc/vlm.c: pre-parse vod media items.

* modules/stream_out/transcode.c: re-use the SPU engine.
* src/video_output/vout_subpictures.c: support for resizing subpictures.

* modules/misc/rtsp.c, include/vlc_vod.h: vod server api update.
* include/vlc_input.h: extended input_item_t a bit for the vod server.

msg_Err -> msg_Dbg

* INSTALL.win32: update with new contrib package.

* modules/video_filter/swscale/*: new resizing/chroma conversion video filter based on MPlayer's swscale module.
  (not enabled in configure.ac yet as it may have problems building on some platforms)

   (cause latest BeOS gcc doesn't do it by default anymore)

* src/video_output: fixed a CPU heating loop in pause mode (fixes the problem with fast user switching on win32).

  - switch to access_demux module for raw video/audio streams.
  - massive cleanup and simplifications.
  - a bunch of fixes.

* modules/access/dshow: simplification (video inversion is now handled in the rawvideo codec/packetizer).

* modules/video_output/directx/events.c: use a different window class for the video sub-window so the background color doesn't get messed-up with.

* modules/video_output/x11/xcommon.c, modules/video_output/directx/directx.c: when we invert the YV12 picture buffer chroma planes, we need to report a I420 chroma.