2005-09-22  Wolfgang Hofer <hof@gimp.org>

        - added sourcecode of external_libs (libmpeg3 and ffmpeg)
          as gzipped tarballs.
          Those libs are now automatically configured, built
          and linked statically with the gimp-gap plug-ins
          (as convenience libraries).

          configure options for the external libs can be
          specified via files:

          extern_libs/configure_options_ffmpeg.txt
          extern_libs/configure_options_libmpeg3.txt

        - removed configure support for linking
          libavformat and libavcodec with already installed
          libraries.
          (the removed code did not properly check
           and was limited to fixed installation dirs)

        * configure.in
        * Makefile.am
        * README

        * extern_libs               # newly added directory
        * extern_libs/Makefile.am
        * extern_libs/configure_options_ffmpeg.txt
        * exte...