cmd: include go-ethereum's log to stdout (#134)

fixes #133

cmd/ethermintd/start.go

@@ -37,6 +37,7 @@ import (
 	storetypes "github.com/cosmos/cosmos-sdk/store/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 
+	ethlog "github.com/ethereum/go-ethereum/log"
 	ethrpc "github.com/ethereum/go-ethereum/rpc"
 
 	"github.com/cosmos/ethermint/cmd/ethermintd/config"
@@ -236,6 +237,7 @@ func startInProcess(ctx *server.Context, clientCtx client.Context, appCreator ty
 	var httpSrvDone = make(chan struct{}, 1)
 	var wsSrv rpc.WebsocketsServer
 
+	ethlog.Root().SetHandler(ethlog.StdoutHandler)
 	if config.EVMRPC.Enable {
 		tmEndpoint := "/websocket"
 		tmRPCAddr := cfg.RPC.ListenAddress