rename BC_HIDDEN to BC_INTERNAL
rename BC_HIDDEN to BC_INTERNAL

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