SHA-3 (Keccak) module for Python 2.6 to 3.4. The package is a wrapper around the
optimized reference implementation from http://keccak.noekeon.org/ . Only
the optimizations for 32 and 64bit platforms are used. The optimized SSE and
ARM assembly variants are ignored for now.

The module is a standalone version of my SHA-3 module from Python 3.4
(currently under development). The code in sha3module.c has been modified to
be compatible with Python 2.6 to 3.4. Python 2.5 and earlier are not
supported.