Intel Slicing-by-8 CRC32 algorithm

WinRAR uses CRC32 function based on Intel Slicing-by-8 algorithm.

Original Intel Slicing-by-8 code is available on sourceforge.net/projects/slicing-by-8 and licensed under BSD License available at http://www.opensource.org/licenses/bsd-license.html Text of BSD license is provided below:

Copyright (c) 2004-2006 Intel Corporation.
All Rights Reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

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