This class implements the CRC-32 checksum algorithm. The digest returned is a little-endian 4 byte string.
Tango Dual License: 3-Clause BSD License / Academic Free License v3.0. See LICENSE_TANGO.txt for details.
Copyright (c) 2006 James Pelcis. Some parts copyright (c) 2009-2016 dunnhumby Germany GmbH. All rights reserved.
Initial release: August 2006