compile gpg-error without nls support because it isn't really used by VLC and it complicates the contrib system. (this should fix the OSX 10.2 compile). Also switch back to ffmpeg CVS

* let's build libtwolame by default on OSX and Linux; we might want to disable the original lame in the final release

  twolame is thread-safe and maintained. Update your batch files for
  --enable-twolame instead of --enable-toolame. See http://twolame.sf.net
  for more information.

* upgraded libcdio to 0.7.2 (not that it makes much difference :) )

* dirty patch to tell vlc (on osx) that it needs -liconv when it links to libcdio. This should be fixed in the libcdio pkgconfig, but i'm tired of figuring out how to patch libcdio to do this.

   Give an argument to bootstrap to use it (for example
   `./bootstrap i586-pc-beos')

* all: updated the used Matroska/Ebml versions to 0.7.5 / 0.7.3, removed the old patches and changed their URLs to the official server instead of the VideoLAN-one

* contrib/Makefile: remove the BUILDDIRS on clean-src as well to prevent the disposal of outdated stuff and its mixture with newer libraries
* contrib/src/Makefile: touch .aclocal after copying the aclocal files, so this isn't done everytime make runs

  added a .aclocal change to copy the m4 from extras/contrib/share/aclocal to
  the vlc m4 dir. No more complete bootstrap after a simple configure.ac or Makefile.am change. :)

* build libiconv without i18n-support, so it can be compiled without gettext -- gettext will be compiled afterwards, so it can take advantage of libiconv