added a few articles, added media

_site/tmp/var/www/chaospott.de/example-hooks/post_dummy.php

@@ -0,0 +1,8 @@
+<?php
+class Dummy extends Hook
+{
+    public function doHook(Post $post)
+    {
+        error_log('Hooked ' . $post->title);
+    }
+}