Update Readme to reflect dynamic config changes

Author: davibennun

README.md

@@ -8,7 +8,7 @@ Installation
 
 Update your `composer.json` file to include this package as a dependency
 
-Laravel 5
+Laravel 5 & Lumen
 
 ```json
 "davibennun/laravel-push-notification": "dev-laravel5"
@@ -36,7 +36,7 @@ Alias the PushNotification facade by adding it to the aliases array in the `app/
 
 # Configuration
 
-Copy the config file into your project by running
+Copy the config file into your project by running: (Lumen users skip this)
 
 Laravel 5
 ```php
@@ -84,6 +84,23 @@ PushNotification::app('appNameIOS')
 
 ```
 Where app argument `appNameIOS` refers to defined service in config file.
+
+###Dynamic configuration and Lumen users
+You can set the app config array directly: (keep in mind the array schema)
+```php
+//iOS app
+PushNotification::app(['environment' => 'development',
+		'certificate' => '/path/to/certificate.pem',
+		'passPhrase'  => 'password',
+		'service'     => 'apns']);
+//Android app		
+PushNotification::app(['environment' => 'production',
+		'apiKey'      => 'yourAPIKey',
+		'service'     => 'gcm']);
+
+```
+
+
 To multiple devices and optioned message:
 ```php
 $devices = PushNotification::DeviceCollection(array(
@@ -108,7 +125,7 @@ $message = PushNotification::Message('Message Text',array(
     ))
 ));
 
-collection = PushNotification::app('appNameIOS')
+$collection = PushNotification::app('appNameIOS')
     ->to($devices)
     ->send($message);