Add missing command.sh for travis

command.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+function build_sketch()
+{
+	local sketch=$1
+
+	# buld sketch with arudino ide
+	echo -e "\n Build $sketch \n"
+	arduino --verbose --verify $sketch
+
+	# get build result from arduino
+	local re=$?
+
+	# check result
+	if [ $re -ne 0 ]; then
+		echo "Failed to build $sketch"
+		return $re
+	fi
+}