Patch from Vitalijus dot Slavinskas at stud dot ktu dot lt

 macosx/vout*: fixed quality problems introduced in my last commit
   (noticeably slower now, but fixed), cleaning

 * SSE2 detection, using a similar approch as for SSE

 * modules/gui/skins2/ctrl_slider.cpp: Fixed a couple of bugs

 * MMX and SSE2 versions of the Merge() function.

* parser/builder_data.def: forgot to commit that for months !

 (avoid segfaults in element handlers...)
* all: tried to have the popup window disappear with a click on
 a skin window (not working at least with wxgtk)

  Differences with the patch I posted in vlc-devel yesterday:
  - took into account the suggestions of gibalou
  - removed the "#if !defined( SYS_DARWIN )", because it should compile
    fine on Mac OS X, even if IGMPv3 won't work
  - added a warning about non-IGMPv3 OSes

hoisted. Some doc additions.

 * udp.c: restored the old syntax udp:server_addr@destination_addr
 * libvlc.h: updated 'vlc --help'

 To do an IGMPv3 query under Windows XP do:
 vlc udp:<source_addr>@<multicast_addr>
 Note: under previous versions of Windows, it will fail to join the group.

* Makefile.am: added vlc_meta.h

  And a first cut at handling transparancy values properly. However
  to do this we merely needed to

pixmap.[ch]: write our own routines for retrieving a close colormap index
  given a pixel value. Well, and also had to

video_chroma/i420_rgb.[ch]: save the RGB colormap that is allocated.

Modules.am: forgot new pixmap.c

others: more misc abstraction/cleanup

 it will only be used by demuxers).
 * ninput.h: added DEMUX_GET_META, this way demuxer won't have to touch
 playlist and input_InfoAdd and ...

 Now we can stream a (complete) dvd with language informations :)

 * dvdnav: select the right SPU track only while creating the ES when we
 are not in the menu. (this way user selection won't be lost).

 expanded to the real language name.