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

Permission is granted to anyone to use this software or documentation 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 or documentation must not be misrepresented; you must not claim that you wrote the original software or documentation. If you use this software or documentation 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 or documentation. Altered source versions may be contributed back to the author to be integrated into the original software or documentation at the author's discretion.

> 3. Neither this notice or reference to it nor any copyright, author or contributor clause may be removed from or altered in any software source distribution or documentation covered by this license.

> 4. Neither the name of the author, nor the names of contributors may be used to endorse or promote products derived from this software or documentation without specific prior written permission.