Add Hash160

[mrx23dot]

hash160 (20byte) format is very important and missing from output.

[mrx23dot]

It's already in the code, just needs printing:

 def _generate_publicaddress1(self, prefix_a, prefix_b):
        p = self._generate_uncompressed_pubkey(prefix_b)
        m = prefix_a + hash160(p).digest()