DoExtShuffle into smaller functions.

   I didn't remove all the code handling the removed attribute (Playlist.var),
   because it can still be useful if we decide to have other List controls.

                              widths (MMX untested)

                   in window mode. I'm not sure how we can catch
                   mouseDown events in fullscreen GL mode)

    + Updated the British translation.
    + Merged Javier Varela's Spanish translation. There's more to come.

   coding style changes

   style fixes

* po/it.po: layout fixes to the rc-help-message

 * skins2/parser/expr_evaluator.cpp: small fix for enhanced flexibility

    handle is now stored in VlcProc.
  * x11/x11_window.cpp, win32/win32_window.cpp: set the vout window in 
    VlcProc instead of the old "drawable" trick
  * all: renamed "Time" into "StreamTime" because of a name conflict with 
   X11 (did i hear "namespace" ? ;)

> #, fuzzy
> msgid "Date metadata"
> msgstr "Death metal"

                 cannot be affected by VLC loading the next picture
		 (should fix the artifacts when moving or resizing
		  the window)

	- old VLCInfo and InfoPanel have been removed from nib file
	- VLCPlaylistInfo and PlaylistInfoPanel have been renamed
	- old info.c and info.h are still in repository, but not compiled, should I remove them ?

* share/skins2/skin.catalog: added a default catalog as some platforms don't provide one (eg. win32).
* modules/gui/skins2/parser/skin_parser.cpp: try to load the skins catalog and if it fails, use the system's one.

 * modules/gui/macosx/vout.m: conf->var video-on-top in OS X.

    (a bit "C-style-coded" at the moment ;)
  * utils/var_bool.*: added true and false boolean variables, and the "OR"
    composite variable
  * src/var_manager.*: support for anonymous variables
  * parser/interpreter.cpp: use the RPN evaluator to resolve boolean
    expressions in the XML. Any well-parenthesized expression using "not",
    "or", "and", "true", "false" and boolean variables should be understood
    (not much tested yet).

  + small fix for --ffmpeg-workaround-bugs.
  + new --ffmpeg-vismv option to visualize motion vectors.