event documentation

Author: jildertmiedema

README.md

@@ -40,6 +40,42 @@ PR is welcome!
 
 ![FileManager screenshot 2](http://unisharp.com/img/filemanager2.png)
 
+## Events
+
+To use events you can add a listener to listen to the events
+
+Snippet for `EventServiceProvider`
+```php
+    protected $listen = [
+        ImageWasUploaded::class => [
+            UploadListener::class,
+        ],
+    ];
+```
+
+The `UploadListener` will look like:
+```php
+class UploadListener
+{
+    public function handle($event)
+    {
+        $method = 'on'.class_basename($event);
+        if (method_exists($this, $method)) {
+            call_user_func([$this, $method], $event);
+        }
+    }
+
+    public function onImageWasUploaded(ImageWasUploaded $event)
+    {
+        $path = $event->path();
+        //your code, for example resizing and cropping
+    }
+}
+```
+
+List of events:
+ * Unisharp\Laravelfilemanager\Events\ImageWasUploaded
+
 ## Credits
  * All contibutors from GitHub. (issues / PR)
  * Special thanks to