add example article hook plugin

plugins/example_article/init.php

@@ -0,0 +1,31 @@
+<?php
+class Example_Article extends Plugin {
+
+	private $link;
+	private $host;
+
+	function about() {
+		return array(1.0,
+			"Example plugin for HOOK_RENDER_ARTICLE",
+			"fox",
+			true);
+	}
+
+	function init($host) {
+		$this->link = $host->get_link();
+		$this->host = $host;
+
+		$host->add_hook($host::HOOK_RENDER_ARTICLE, $this);
+	}
+
+	function get_prefs_js() {
+		return file_get_contents(dirname(__FILE__) . "/init.js");
+	}
+
+	function hook_render_article($article) {
+		$article["content"] = "Content changed: " . $article["content"];
+
+		return $article;
+	}
+}
+?>