Update bitcoind fee handling
Update bitcoind fee handling

yurizhykin/openbazaar-go,cpacia/openbazaar-go,cpacia/openbazaar-go,OpenBazaar/openbazaar-go,JustinDrake/openbazaar-go,jackkleeman/openbazaar-go,hoffmabc/openbazaar-go,yurizhykin/openbazaar-go,yurizhykin/openbazaar-go,JustinDrake/openbazaar-go,cpacia/openbazaar-go,jackkleeman/openbazaar-go,duomarket/openbazaar-test-nodes,duomarket/openbazaar-test-nodes,hoffmabc/openbazaar-go,gubatron/openbazaar-go,gubatron/openbazaar-go,OpenBazaar/openbazaar-go,hoffmabc/openbazaar-go,duomarket/openbazaar-test-nodes,gubatron/openbazaar-go,OpenBazaar/openbazaar-go,jackkleeman/openbazaar-go,JustinDrake/openbazaar-go