Move licensing information into a separate file called LICENSE and

rewrite it for greater clarity in the process.

Originally committed as revision 18185 to svn://svn.ffmpeg.org/ffmpeg/trunk

README

@@ -9,35 +9,4 @@ FFmpeg README
 2) Licensing
 ------------
 
-* Read the file COPYING.LGPL. FFmpeg and the associated libraries EXCEPT
-  for libpostproc are licensed under the GNU Lesser General Public License
-  version 2.1 or later.
-
-* libpostproc is distributed under the GNU General Public License version 2
-  or later, see the file COPYING.GPL for details. Its compilation and use in
-  FFmpeg is optional.
-
-* libswscale contains some optional processor-specific optimizations that are
-  distributed under the GNU General Public License version 2 or later.
-
-* The files libavcodec/x86/idct_mmx.c, libavcodec/x86/h264_deblock_sse2.asm
-  and libavcodec/x86/h264_idct_sse2.asm are distributed under the GNU General
-  Public License version 2 or later. They are strictly optimizations and
-  their use is optional.
-
-* The file libavcodec/ac3dec.c is distributed under the GNU General Public
-  License version 2 or later. In order for (E-)AC-3 decoding to work you
-  need to enable GPL components.
-
-* The file libavdevice/x11grab.c is distributed under the GNU General
-  Public License version 2 or later. X11 grabbing is optional.
-
-* The files libavcodec/jfdctfst.c, libavcodec/jfdctint.c, libavcodec/jrevdct.c
-  are taken from libjpeg, see the top of the files for licensing details.
-
-* The file libavcodec/fdctref.c is copyrighted by the MPEG Software Simulation
-  Group with all rights reserved. It is only used to create a DCT test program
-  and not compiled into libavcodec.
-
-* Some external libraries are under GPL. If you wish to use them with FFmpeg,
-  you have to configure FFmpeg as GPL as well.
+* See the LICENSE file.