Adding code to work as script

Author: Manuel Eusebio de Paz Carmona

P01_benchmark/mysql_insert_loop.js

@@ -1,3 +1,6 @@
+# work as an script: chmod +x filename.js
+#!/usr/bin/env node
+
 var mysql = require('mysql');
 // Create a connection to MySql Server and Database
 

P01_benchmark/mysql_insert_loop.py

@@ -1,3 +1,4 @@
+# work as an script: chmod +x filename.js
 #/usr/bin/env python
 
 import time,mysql.connector

P02_nodejsutilities/parse_json_lines.js

@@ -1,3 +1,6 @@
+# work as an script: chmod +x filename.js
+#!/usr/bin/env node
+
 var Lazy=require("lazy");
 new Lazy(process.stdin).lines.forEach(
           function(line) {