Rename plugins to libs and update all file references

libs/stripe-php/lib/RelatedObject.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Stripe;
+
+/**
+ * @property string $id Unique identifier for the event.
+ * @property string $type the "object" of the related object.
+ * @property string $url a relative url to retrieve the related object.
+ */
+class RelatedObject
+{
+    public $id;
+    public $type;
+    public $url;
+
+    public function __construct($json)
+    {
+        $this->id = $json['id'];
+        $this->type = $json['type'];
+        $this->url = $json['url'];
+    }
+}