Rest api in joomla 3 4 with slim framework part 1

In this tutorial, I am going to give you a quick introduction of REST API in Joomla 3.4 with SLIM Framework. To get started with Slim part-1 tutorial, here is small introduction about slim framework which is specifically mentioned on SLIM official website that: "Slim is a PHP micro framework that helps you quickly write simple yet powerful web applications and APIs."