Licence and copyright
The following license information is pulled straight out of the source code
and only repeated here for your convienience
/* Copyright (c) 2006 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
*/
This program makes use of the zlib compression library made by Jean-loup Gailly
and Mark Adler. See license.
/* zlib.h -- interface of the 'zlib' general purpose compression library
*  version 1.2.3, July 18th, 2005
*
*  Copyright (C) 1995-2005 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 jloup@gzip.org
*  Mark Adler madler@alumni.caltech.edu
*
*/