Add Packagist badges

Author: kenjis

README.md

@@ -1,5 +1,7 @@
 # CodeIgniter Simple and Secure Twig
 
+[![Latest Stable Version](https://poser.pugx.org/kenjis/codeigniter-ss-twig/v/stable)](https://packagist.org/packages/kenjis/codeigniter-ss-twig) [![Total Downloads](https://poser.pugx.org/kenjis/codeigniter-ss-twig/downloads)](https://packagist.org/packages/kenjis/codeigniter-ss-twig) [![Latest Unstable Version](https://poser.pugx.org/kenjis/codeigniter-ss-twig/v/unstable)](https://packagist.org/packages/kenjis/codeigniter-ss-twig) [![License](https://poser.pugx.org/kenjis/codeigniter-ss-twig/license)](https://packagist.org/packages/kenjis/codeigniter-ss-twig)
+
 This package provides simple Twig integration for [CodeIgniter](https://github.com/bcit-ci/CodeIgniter) 3.0.
 
 ## Folder Structure