update README

README.md

@@ -1,13 +1,13 @@
-# OVS
+# OVS [![Build Status](https://api.travis-ci.com/xgfone/go-ovs.svg?branch=master)](https://travis-ci.com/github/xgfone/go-ovs) [![GoDoc](https://pkg.go.dev/badge/github.com/xgfone/go-ovs)](https://pkg.go.dev/github.com/xgfone/go-ovs) [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg?style=flat-square)](https://raw.githubusercontent.com/xgfone/go-ovs/master/LICENSE)
 
-A simple OVS flow executor.
+A simple OVS flow executor supporting `Go1.7+`.
 
 ## Install
 ```shell
 $ go get -u github.com/xgfone/go-ovs
 ```
 
-**Notice:** In order to log the every executed command, you maybe add the log hook for default command executor, `github.com/xgfone/go-tools/v7/execution#DefaultCmd`, such as `execution.DefaultCmd.AppendResultHooks(logHook)`. Or, you can call the convenient function `github.com/xgfone/goapp/exec#SetDefaultCmdLogHook`, such as `exec.SetDefaultCmdLogHook()`, which will add a default log hook.
+**Notice:** In order to log the every executed command, you maybe add the log hook for default command executor, `github.com/xgfone/go-exec#DefaultCmd`, such as `exec.DefaultCmd.AppendResultHooks(logHook)`. Or, you can call the convenient function `github.com/xgfone/goapp/exec#SetDefaultCmdLogHook`, such as `exec.SetDefaultCmdLogHook()`, which will add a default log hook.
 
 
 ## Example
@@ -27,9 +27,9 @@ func main() {
 }
 
 func initBridge(bridge string) {
-	exec.MustExecutes("ovs-vsctl", "--may-exist", "add-br", bridge,
+	exec.MustExecute("ovs-vsctl", "--may-exist", "add-br", bridge,
 		"--", "set-fail-mode", bridge, "secure")
-	exec.MustExecutes("ip", "link", "set", bridge, "up")
+	exec.MustExecute("ip", "link", "set", bridge, "up")
 }
 
 func initFlows(bridge string) {