Add about CodeIgniter REST Server

Author: kenjis

README.md

@@ -93,6 +93,12 @@ $ php bin/install.php ion-auth 2
 $ php bin/install.php filename-checker master
 ```
 
+[CodeIgniter REST Server](https://github.com/chriskacerguis/codeigniter-restserver):
+
+```
+$ php bin/install.php restserver 2.7.2
+```
+
 ### Run PHP built-in server (PHP 5.4 or later)
 
 ```