added note in readme for excluded illuminate/html package in L5

Author: cmgmyr

readme.md

@@ -67,6 +67,9 @@ Add the trait to your user model:
 * [Routes](https://github.com/cmgmyr/laravel-messenger/blob/develop/src/Cmgmyr/Messenger/examples/routes.php)
 * [Views](https://github.com/cmgmyr/laravel-messenger/tree/develop/src/Cmgmyr/Messenger/examples/views)
 
+__Note:__ These examples use the [illuminate/html](https://packagist.org/packages/illuminate/html) package that is no longer included in Laravel 5 out of the box. Make sure you require this dependency in your `composer.json` file if you intend to use the example files.
+
+
 ## Contributing? 
 Please format your code before creating a pull-request: