added on and off script

Author: marabesi

app/index-cli.php renamed to app/off.php

@@ -0,0 +1,8 @@
+<?php
+
+require '../vendor/autoload.php';
+
+$arduino = new \Arduino\Wrapper();
+
+$writer = new \Arduino\Writer($arduino);
+$writer->out('/dev/cu.usbmodem1411', 'ON');