1Copyright (c) 2008 - 2013 Paul Butler and contributors 2 3This sofware may be used under a zlib/libpng-style license: 4 5This software is provided 'as-is', without any express or implied warranty. In 6no event will the authors be held liable for any damages arising from the use 7of this software. 8 9Permission is granted to anyone to use this software for any purpose, including 10commercial applications, and to alter it and redistribute it freely, subject to 11the following restrictions: 12 131. The origin of this software must not be misrepresented; you must not claim 14that you wrote the original software. If you use this software in a product, an 15acknowledgment in the product documentation would be appreciated but is not 16required. 17 182. Altered source versions must be plainly marked as such, and must not be 19misrepresented as being the original software. 20 213. This notice may not be removed or altered from any source distribution. 22 23