Merge pull request #2930 from fjl/ethclient

accounts/abi/bind/backend.go

accounts/abi/bind/backends/remote.go

accounts/abi/bind/backends/simulated.go

accounts/abi/bind/base.go

accounts/abi/bind/bind_test.go

accounts/abi/bind/template.go

accounts/abi/bind/util.go

accounts/abi/bind/util_test.go

core/types/block.go

core/types/bloom9.go

core/types/json.go

core/types/json_test.go

core/types/receipt.go

core/types/transaction.go

core/vm/log.go

core/vm/log_test.go

eth/bind.go

eth/handler.go

ethclient/ethclient.go

ethclient/ethclient_test.go