Added a few middleware packages

README.md

     - [Frameworks](#frameworks)
     - [Framework Extras](#framework-extras)
     - [Components](#components)
-    - [Configuration](#configuration)
     - [Micro Frameworks](#micro-frameworks)
     - [Micro Framework Extras](#micro-framework-extras)
     - [Routers](#routers)
 ## Middlewares
 *Libraries for building application using middlewares.*
 
-* [Stack](https://github.com/stackphp) - A library of stackable middleware for Silex/Symfony.
+* [PSR7-Middlewares](https://github.com/oscarotero/psr7-middlewares) - Inspiring collection of handy middlewares.
+* [Relay](https://github.com/relayphp/Relay.Relay) - A PHP 5.5 PSR-7 middleware dispatcher
 * [Slim Middleware](https://github.com/slimphp/Slim-Middleware) - A collection of custom middleware for Slim.
+* [Stack](https://github.com/stackphp) - A library of stackable middleware for Silex/Symfony.
 * [zend-stratigility](https://github.com/zendframework/zend-stratigility) - Middleware for PHP built on top of PSR-7
 
 ## URL