* Fix some cosmetics

Track RTP sequence numbers and mark the first MPEG2-TS packet with a transport error when a discontinuity occurs.

(Forward port from branch 0.8.1-jpsaman-thedj) TS demux can now dump a TS stream directly to a file or special devices, this mode can be used with DSP's. Enhanced CSA encryption/decryption with a non standard mode to encrypt/decrypt a part of a TS packet. Further I replaced a bunch of // comments with /* .. */ comments style.

    - complete functionality except "Extract" (I'm going to fix that next week)
* MainMenu.nib: re-orded the window-menu a bit
* wizard.*: added a method to launch it from the bookmarks

 * skins2: Added dialogs.directory() and dialogs.streamingWizard() actions
 * doc/skins/skins2-howto.xml: Updated the doc accordingly

 * ask to uninstall VLC before installing
 * use several languages (its nice for people who really don't talk english)
 * small fixes

 * all: removed some warnings

 * sap.c: compilation fix
 * win32_graphics.cpp: avoid multiple #define

    - save the prefs when they are changed, so the settings are kept
    - restore the objects to the correct values
    - fixed some compiler warnings
    - i18n support additions
    
* Extended.nib: minor tweak
    
* wxwidgets/extrapanel.cpp: fixed typo

 * modules/control/http.c: Use scandir instead of readdir since it allows
   to sort the files alphanumerically.
 * src/misc/charset.c: Fixed the declaration of vlc_fix_readdir_charset.

   play. playlist_add takes two arguments, mrl and name, and returns
   the ID of the added item. play takes 1 argument, the ID of the item,
   and returns non-zero in case of error. These functions are much more
   convenient than using the "control" tags, because you can then do
   several commands in the same page, and get the playlist ID of the
   added item, which many people complained about.