updated events.md

Added 3 more events to List of events.
Added How to use events using Event Subscribers.

doc/events.md

@@ -9,6 +9,9 @@
 
 ## List of events
  * Unisharp\Laravelfilemanager\Events\ImageWasUploaded
+ * Unisharp\Laravelfilemanager\Events\ImageWasRenamed
+ * Unisharp\Laravelfilemanager\Events\ImageWasDeleted
+ * Unisharp\Laravelfilemanager\Events\FolderWasRenamed
 
 ## How to use
 
@@ -42,3 +45,47 @@ class UploadListener
     }
 }
 ```
+
+Or by using Event Subscribers
+
+Snippet for `EventServiceProvider`
+```php
+    protected $subscribe = [
+        UploadListener::class
+    ];
+```
+The `UploadListener` will look like:
+```php
+    public function subscribe($events)
+    {
+        $events->listen('*', UploadListener::class);
+    }
+
+    public function handle($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
+    }
+
+    public function onImageWasRenamed(ImageWasRenamed $event)
+    {
+        // image was renamed
+    }
+
+    public function onImageWasDeleted(ImageWasDeleted $event)
+    {
+        // image was deleted
+    }
+
+    public function onFolderWasRenamed(FolderWasRenamed $event)
+    {
+        // folder was renamed
+    }