Update doc.
Update doc.

swansontec/libbitcoin,libtetcoin/libtetcoin-consensus,libmetrocoin/libmetrocoin-consensus,swansontec/libbitcoin,libtetcoin/libtetcoin-consensus,GroestlCoin/libgroestlcoin,libmetrocoin/libmetrocoin-consensus,swansontec/libbitcoin,libtetcoin/libtetcoin-consensus,libmetrocoin/libmetrocoin-consensus,libtetcoin/libtetcoin-consensus,swansontec/libbitcoin,libmetrocoin/libmetrocoin-consensus,GroestlCoin/libgroestlcoin,libmetrocoin/libmetrocoin-consensus,GroestlCoin/libgroestlcoin,libtetcoin/libtetcoin-consensus,GroestlCoin/libgroestlcoin