use microformat to mark html from [embed] tag, convert html with oembed microformat to [embed] tag

include/items.php

@@ -1,6 +1,7 @@
 <?php
 
 require_once('bbcode.php');
+require_once('oembed.php');
 
 function get_feed_for(&$a, $dfrn_id, $owner_nick, $last_update, $direction = 0) {
 
@@ -395,6 +396,8 @@ function get_atom_elements($feed,$item) {
 		$res['body'] = preg_replace('#<object[^>]+>.+?' . 'http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s',
 			'[youtube]$1[/youtube]', $res['body']);
 
+		$res['body'] = oembed_html2bbcode($res['body']);
+	
 		$config = HTMLPurifier_Config::createDefault();
 		$config->set('Cache.DefinitionImpl', null);