use RPC batch for unconfirmed_transactions()
use RPC batch for unconfirmed_transactions()

gotcha/testcounter,stefcrypto/counterparty-lib,tokenly/counterparty-lib,coinwarp/dogeparty-lib,F483/counterparty-lib,CounterpartyXCP/counterparty-lib,CounterpartyXCP/counterparty-lib,monaparty/counterparty-lib,monaparty/counterparty-lib,jarymoth/counterpartyd,F483/counterparty-lib