README updated

Author: devtronic

README.md

@@ -17,6 +17,29 @@
 ## Installation
 ``` bash
 $ composer require --dev devtronic/cms-bundle
+```
+
+```php
+<?php
+
+use Symfony\Component\HttpKernel\Kernel;
+use Symfony\Component\Config\Loader\LoaderInterface;
+
+class AppKernel extends Kernel
+{
+    public function registerBundles()
+    {
+        $bundles = array(
+            // ...
+
+            new Devtronic\CmsBundle\CmsBundle(),
+        );
+        // ...
+        return $bundles;
+    }
+    // ...
+}
+
 ```
 ## Configuration
 ```yml