This software is provided 'as-is', without any express or impliedwarranty. In no event will the authors be held liable for any damagesarising 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 itfreely, 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.