implement HOOK_FEED_PARSED, add example plugin (refs #424)

plugins/example_feed/example_feed.php

@@ -0,0 +1,22 @@
+<?php
+class Example_Feed extends Plugin {
+
+	// Demonstrates how to query data from the parsed feed object (SimplePie)
+	// don't enable unless debugging feed through f D hotkey or manually.
+
+	private $link;
+	private $host;
+
+	function __construct($host) {
+		$this->link = $host->get_link();
+		$this->host = $host;
+
+		$host->add_hook($host::HOOK_FEED_PARSED, $this);
+	}
+
+	function hook_feed_parsed($feed) {
+		_debug("I'm a little feed short and stout, here's my title: " . $feed->get_title());
+		_debug("... here's my link element: " . $feed->get_link());
+	}
+}
+?>