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<!--*- markdown -*-->

Licenses
========

Emacs
-----

[GPL version 3](www.gnu.org/licenses/gpl.html)

AUCTeX
------

[GPL version 3](www.gnu.org/licenses/gpl.html)

librsvg
-------

[GNU Library GPL](http://www.gnu.org/copyleft/library.html)

gnutls
------

[Lesser GPL](http://www.gnu.org/licenses/lgpl.html)
or
[GPL version 3](www.gnu.org/licenses/gpl.html)

libtiff
-------

	Copyright (c) 1988-1997 Sam Leffler
	Copyright (c) 1991-1997 Silicon Graphics, Inc.

	Permission to use, copy, modify, distribute, and sell this software and 
	its documentation for any purpose is hereby granted without fee, provided
	that (i) the above copyright notices and this permission notice appear in
	all copies of the software and related documentation, and (ii) the names of
	Sam Leffler and Silicon Graphics may not be used in any advertising or
	publicity relating to the software without the specific, prior written
	permission of Sam Leffler and Silicon Graphics.

	THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
	EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
	WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

	IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
	ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
	OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
	WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
	LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
	OF THIS SOFTWARE.

libpng
------

	COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:

	If you modify libpng you may insert additional notices immediately following
	this sentence.

	libpng versions 1.2.6, August 15, 2004, through 1.2.8, December 3, 2004, are
	Copyright (c) 2004 Glenn Randers-Pehrson, and are
	distributed according to the same disclaimer and license as libpng-1.2.5
	with the following individual added to the list of Contributing Authors:

	Cosmin Truta

	libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are
	Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
	distributed according to the same disclaimer and license as libpng-1.0.6
	with the following individuals added to the list of Contributing Authors:

	Simon-Pierre Cadieux
	Eric S. Raymond
	Gilles Vollant

	and with the following additions to the disclaimer:

	There is no warranty against interference with your enjoyment of the
	library or against infringement.  There is no warranty that our
	efforts or the library will fulfill any of your particular purposes
	or needs.  This library is provided with all faults, and the entire
	risk of satisfactory quality, performance, accuracy, and effort is with
	the user.

	libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
	Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are
	distributed according to the same disclaimer and license as libpng-0.96,
	with the following individuals added to the list of Contributing Authors:

	Tom Lane
	Glenn Randers-Pehrson
	Willem van Schaik

	libpng versions 0.89, June 1996, through 0.96, May 1997, are
	Copyright (c) 1996, 1997 Andreas Dilger
	Distributed according to the same disclaimer and license as libpng-0.88,
	with the following individuals added to the list of Contributing Authors:

	John Bowler
	Kevin Bracey
	Sam Bushell
	Magnus Holmgren
	Greg Roelofs
	Tom Tanner

	libpng versions 0.5, May 1995, through 0.88, January 1996, are
	Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.

	For the purposes of this copyright and license, "Contributing Authors"
	is defined as the following set of individuals:

	Andreas Dilger
	Dave Martindale
	Guy Eric Schalnat
	Paul Schmidt
	Tim Wegner

	The PNG Reference Library is supplied "AS IS".  The Contributing Authors
	and Group 42, Inc. disclaim all warranties, expressed or implied,
	including, without limitation, the warranties of merchantability and of
	fitness for any purpose.  The Contributing Authors and Group 42, Inc.
	assume no liability for direct, indirect, incidental, special, exemplary,
	or consequential damages, which may result from the use of the PNG
	Reference Library, even if advised of the possibility of such damage.

	Permission is hereby granted to use, copy, modify, and distribute this
	source code, or portions hereof, for any purpose, without fee, subject
	to the following restrictions:

	1. The origin of this source code must not be misrepresented.

	2. Altered versions must be plainly marked as such and
	must not be misrepresented as being the original source.

	3. This Copyright notice may not be removed or altered from
	any source or altered source distribution.

	The Contributing Authors and Group 42, Inc. specifically permit, without
	fee, and encourage the use of this source code as a component to
	supporting the PNG file format in commercial products.  If you use this
	source code in a product, acknowledgment is not required but would be
	appreciated.

zlib
----

	zlib.h -- interface of the 'zlib' general purpose compression library
	version 1.2.8, April 28th, 2013

	Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler

	This software is provided 'as-is', without any express or implied
	warranty.  In no event will the authors be held liable for any damages
	arising from the use of this software.

	Permission is granted to anyone to use this software for any purpose,
	including commercial applications, and to alter it and redistribute it
	freely, subject to the following restrictions:

	1. The origin of this software must not be misrepresented; you must not
	claim that you wrote the original software. If you use this software
	in a product, an acknowledgment in the product documentation would be
	appreciated but is not required.
	2. Altered source versions must be plainly marked as such, and must not be
	misrepresented as being the original software.
	3. This notice may not be removed or altered from any source distribution.

	Jean-loup Gailly        Mark Adler
	jloup@gzip.org          madler@alumni.caltech.edu


	The data format used by the zlib library is described by RFCs (Request for
	Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950
	(zlib format), rfc1951 (deflate format) and rfc1952 (gzip format).

libjpeg
-------

	In plain English:

	1. We don't promise that this software works.  (But if you find any bugs,
	please let us know!)
	2. You can use this software for whatever you want.  You don't have to pay us.
	3. You may not pretend that you wrote this software.  If you use it in a
	program, you must acknowledge somewhere in your documentation that
	you've used the IJG code.

	In legalese:

	The authors make NO WARRANTY or representation, either express or implied,
	with respect to this software, its quality, accuracy, merchantability, or
	fitness for a particular purpose.  This software is provided "AS IS", and you,
	its user, assume the entire risk as to its quality and accuracy.

	This software is copyright (C) 1991-1998, Thomas G. Lane.
	All Rights Reserved except as specified below.

	Permission is hereby granted to use, copy, modify, and distribute this
	software (or portions thereof) for any purpose, without fee, subject to these
	conditions:
	(1) If any part of the source code for this software is distributed, then this
	README file must be included, with this copyright and no-warranty notice
	unaltered; and any additions, deletions, or changes to the original files
	must be clearly indicated in accompanying documentation.
	(2) If only executable code is distributed, then the accompanying
	documentation must state that "this software is based in part on the work of
	the Independent JPEG Group".
	(3) Permission for use of this software is granted only if the user accepts
	full responsibility for any undesirable consequences; the authors accept
	NO LIABILITY for damages of any kind.

	These conditions apply to any software derived from or based on the IJG code,
	not just to the unmodified library.  If you use our work, you ought to
	acknowledge us.

	Permission is NOT granted for the use of any IJG author's name or company name
	in advertising or publicity relating to this software or products derived from
	it.  This software may be referred to only as "the Independent JPEG Group's
	software".

	We specifically permit and encourage the use of this software as the basis of
	commercial products, provided that all warranty or liability claims are
	assumed by the product vendor.


	ansi2knr.c is included in this distribution by permission of L. Peter Deutsch,
	sole proprietor of its copyright holder, Aladdin Enterprises of Menlo Park, CA.
	ansi2knr.c is NOT covered by the above copyright and conditions, but instead
	by the usual distribution terms of the Free Software Foundation; principally,
	that you must include source code if you redistribute it.  (See the file
	ansi2knr.c for full details.)  However, since ansi2knr.c is not needed as part
	of any program generated from the IJG code, this does not limit you more than
	the foregoing paragraphs do.

	The Unix configuration script "configure" was produced with GNU Autoconf.
	It is copyright by the Free Software Foundation but is freely distributable.
	The same holds for its supporting scripts (config.guess, config.sub,
	ltconfig, ltmain.sh).  Another support script, install-sh, is copyright
	by M.I.T. but is also freely distributable.

	It appears that the arithmetic coding option of the JPEG spec is covered by
	patents owned by IBM, AT&T, and Mitsubishi.  Hence arithmetic coding cannot
	legally be used without obtaining one or more licenses.  For this reason,
	support for arithmetic coding has been removed from the free JPEG software.
	(Since arithmetic coding provides only a marginal gain over the unpatented
	Huffman mode, it is unlikely that very many implementations will support it.)
	So far as we are aware, there are no patent restrictions on the remaining
	code.

	The IJG distribution formerly included code to read and write GIF files.
	To avoid entanglement with the Unisys LZW patent, GIF reading support has
	been removed altogether, and the GIF writer has been simplified to produce
	"uncompressed GIFs".  This technique does not use the LZW algorithm; the
	resulting GIF files are larger than usual, but are readable by all standard
	GIF decoders.

	We are required to state that
	"The Graphics Interchange Format(c) is the Copyright property of
	CompuServe Incorporated.  GIF(sm) is a Service Mark property of
	CompuServe Incorporated."

giflib
------

	The GIFLIB distribution is Copyright (c) 1997  Eric S. Raymond

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in
	all copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	THE SOFTWARE.

libxml2
-------

	Except where otherwise noted in the source code (e.g. the files hash.c,
	list.c and the trio files, which are covered by a similar licence but
	with different Copyright notices) all the files are:

	Copyright (C) 1998-2003 Daniel Veillard.  All Rights Reserved.

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is fur-
	nished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in
	all copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FIT-
	NESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
	DANIEL VEILLARD BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
	IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CON-
	NECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

	Except as contained in this notice, the name of Daniel Veillard shall not
	be used in advertising or otherwise to promote the sale, use or other deal-
	ings in this Software without prior written authorization from him.

---