Upgrade the C library, crypt_blowfish

You can verify the library by downloading version 1.3 from http://www.openwall.com/crypt/ and running diff against ``bcrypt/crypt_blowfish-1.3``. The only difference should be on line 57 of ``crypt_blowfish.c`` where ``BF_ASM`` is changed from ``1`` to ``0`` to disable ASM since distutils can't seem to invoke a compiler with the correct args for the ``.S``.