The release notes for Crypto++ 5.6.2 follows.
changed license to Boost Software License 1.0
added SHA-3 (Keccak)
updated DSA to FIPS 186-3 (see DSA2 class)
fixed Blowfish minimum keylength to be 4 bytes (32 bits)
fixed Salsa validation failure when compiling with GCC 4.6
fixed infinite recursion when on x64, assembly disabled, and no AESNI
ported to MSVC 2012, GCC 4.7, Clang 3.2, Solaris Studio 12.3, Intel C++ Compiler 13.0
