fix bug,fix spelling mistakes,del redundant code

common/legoCmd/cmd/cmd.go

@@ -0,0 +1,14 @@
+package cmd
+
+import "github.com/urfave/cli"
+
+// CreateCommands Creates all CLI commands.
+func CreateCommands() []cli.Command {
+	return []cli.Command{
+		createRun(),
+		createRevoke(),
+		createRenew(),
+		createDNSHelp(),
+		createList(),
+	}
+}