modules/gui/wxwindows/*: fix for the volume control under win32.

* modules/misc/network/ipv6.c: fixed multicast support on win32. Well, it is working on Win2k but might require run-time OS version checking to have it woking on XP as well. (you might have to add a multicast route: ipv6 rtu FF00::/8 #intfnum)

    using our va_list twice, which caused crashes on architectures where
    va_list is a pointer; we now use va_copy whenever possible.

* modules/misc/network/ipv6.c: gave a quick try to implementing ttl for ipv6.

* modules/gui/wxwindows/interface.cpp: fixed compile issue.

* modules/gui/wxwindows/*: added a volume control.

* modules/access_output/file.c: win32 compilation fix.

* share/Makefile.am: fixed my previous fix ;)

* Makefile.am: fixed inclusion of skins in make dist.

* ALL: bumped version number to 0.6.0-test3 + po updates

* share/Makefile.am: install skins at make install (closes bug #856)

* modules/access_output/file.c: use open() instead of fopen(). This allows us to use _lseeki64() on win32.

* modules/video_filter/osd_text.c: small compile fix that seems to be needed on
some platforms.

* NEWS: updated.

* modules/audio_output/directx.c: fixed mem leak in 5.1 audio.

* modules/demux/ogg.c, modules/codec/theora.c: updated the ogg demuxer and theora decoder to the latest libtheora alpha 2 release.

* modules/gui/skins/*: fix for msvc .dsp generation, replaced the BASIC_SKINS macro with the standard MODULE_NAME_IS_foo one and a couple of compilation fixes for msvc.
* msvc/vlc.dsw: added basic_skins and renamed mpeg_video into mpeg_video_old.
* modules/codec/mpeg_video/parser.c: fixed segfault when idct/motion modules can't be loaded.

  people who explicitely set mpeg_video in the previous version will end
  up with libmpeg2 in 0.6.0.
* modules/codec/libmpeg2.c: Fixed a potential segfault, especially
  with DVDs.
* modules/codec/lpcm.c: Send two PES packets in one aout buffer, because
  some audio filters (read: coreaudio resampler) don't like too small
  packets (I know, this is ugly).

* modules/packetizer/mpegvideo.c, modules/mux/mpeg/*: fixed the dts/pts calculation in the mpegvideo packetizer. It should now handle streams where all the pictures don't have the same duration (eg. 3:2 pulldown). We don't calculate anymore the pts for every frame as it is impossible to do so for non low-delay streams.

* configure.ac.in: added an --enable-mostly-builtin option to avoid having too many plugins.
* modules/gui/skins/src/*: reverted the last BASIC_SKINS patch (BASIC_SKINS was not broken, the changes were done on purpose).
* modules/gui/skins/src/dialogs.[cpp,h]: ran dos2unix on these 2 files.

  the share directory

  but there are still other segfaults sometimes in FileInfo !!

  CTRL button (as expected in a normal playlist !)
  TODO: - do the same under windows
        - replace all button constants 1/2 by MOUSE_LEFT/MOUSE_RIGHT

* removed all the compilation warnings
* fixed LOTS of memory leaks in skins (gibalou, you should try valgrind
  on wxwindows plugin ;)

* modules/mux/mpeg/pes.c: allow cases where we don't write a pts.
* modules/stream_out/display.c: handle cases where we don't have a pts/dts.

* modules/gui/skins/src/vlcproc.cpp: the "play" action will trigger the open dialog if the playlist is empty.

  In vout_CreatePicture() replace i_repeat_first_field by the more useful
  i_nb_fields
* modules/gui/macosx/intf.m: Fixed a warning
* modules/codec/libmpeg2.c include/vout_synchro.h src/video_output/vout_synchro.c:
  Re-added support for slice-I streams, plus miscellaneous tweakings

  than nothing

* modules/gui/skins/x11/x11_window.cpp: avoid flicker when mapping a window.
* share/skins/default/theme.xml: playlist is hidden by default.

* modules/gui/skins/*: display the popupmenu when you right click on the interface.