* modules/stream_out/*: coding style changes + strings review.

to vlc's plugin. A couple of typographical mistakes corrected.

* modules/mux/mp4.c: spec compliance fix.

* src/libvlc.c: another couple of changes to the --help output.

* src/window_manager.cpp: improved the raise window algorithm
* src/tooltip.cpp: fixed a segfault after changing a theme

* src/libvlc.c: improved --help output.

* modules/video_filter/logo.c: compilation fixes.

what DJ was referring to?

 - demux/ts.c, mux/mpeg/ts.c: added support for CSA (de)scrambling
 (fixed key).

* REST: stringreview round 1

 seems to make bogus code (but I'm not sure).

* configure.ac: added --with-xml2-config-path=PATH option.

* modules/gui/skins2/src/var_manager.cpp: delete the variables in the
  right order to avoid invalid reads in the destructor
* modules/gui/skins2/parser/xmlparser: skeleton of a new parser based
  on the text reader API of libxml2

* modules/gui/wxwindows/preferences_widgets.cpp: increased the min/max value for int config vars to +/-10000000.

* modules/mux/mp4.c: store the display size using the proper aspect-ratio.
   Size optimization for the generation of the stsc table.
   Some more clean-up.

 they miss the faad decoder without having an obscure segfault.)

* src/stream_output/stream_output.c, include/stream_output.h: new sout_AccessOutRead() funcion.
* modules/access_output/file.c: implemented sout_AccessOutRead().
* modules/access_output/udp.c: coding style cleanup.
* modules/mux/mp4.c: Added support for generating "fast start" files (ie. with the moov header at the beginning of the file).
   Started some code cleanup.

     filter more than 100% faster here (blend mode). Feel free to check
     if I haven't broken anything, first time doing Altivec ;)

More code cleanups.

* Add missing locks
* Duration sort

* modules/demux/mp4/mp4.c: don't segfault on reference files.