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Found by the GTM Xcode plugin, which was finally updated for Xcode4

Fixes #4952

added used CC, added text operations on psz_authors to keep scrolling times reasonable and fixed a scrolling bug

Remove observer from the notification center in the dealloc method to prevent a crash when notification center posts NSApplicationWillTerminateNotification and the VLAboutBox has already been released.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Basically, we starting scrolling at the beginning, if the window gets reopened and jump back to top once scrolling reached the end of the list.

* fixed a crash when quitting VLC while scrolling the credits in the about window. Additionally, improved the help window's memory print slightly

* added navigation controls to the Help window (implemented with minimal affords by using WebKit's builtin methods). We need a nicer home button graphic, though ;-)

* display the GPL in a separate window linked in the About window and the Help menu. Code cleanup (faster and less memory consuming).

* use the hard-coded authors and thanks lists instead of bundled files and incorporate [22938] for trunk

* implemented the generic VLC media player Help window on OSX to match the QT4 interface. Additionally, I modified the HTML source a bit, so potential umlauts won't be displayed as UTF-16 on OSX, which would lead to German umlauts being Chinese characters, etc. BTW. Withthis commit, we also link against the WebKit framework..

    - removed <10.3 support in the preferences' code
    - added preliminary support for Obj-C 2.0 / Garbage Collection
        - needs to be enabled manually in intf.h for now and is restricted to future Darwin release
    - updated various copyright dates to approbate values
    - configured the source tree in the Xcode project for future Xcode releases
    - finally renamed the Xcode project to the correct bundle extension

- thanks to Vincent van den Heuvel <heuvel@mac.com> for the artwork
- screenshots are available at www.aenneburghardt.de/fk/vlc/about1.jpg and *2.jpg
- feel free to revert or modify this commit if you don't like it this way

* use the current copyright scheme in the about-box; removed a useless colon introduced in the last commit

* other files: small patch to make sure that About.nib is loaded only once

(da big courmischage)

  - removed the defines for i_mode concerning random and loop. We use config
    variables for all of these.
* src/libvlc.h:
  - removed the enqueue playlist config option. It's no longer used.
  - added a repeat option. vlc will keep playing the same playlist_item,
    until the option is unset.
* src/playlist/playlist.c:
  - added a repeat, random and loop variable.
  - wxwindows should use these as well I think.
* modules/gui/macosx:
  - added the INTF_ABOUT_MSG to the about dialog.
  - implemented the about and repeat items.