Change curl opts to improve reachable test

isURLReachable would fail for certain sites, such as Amazon.com. Removing NOBODY and adding RETURNTRANSFER solved the issue for me.

http2pic.class.php

@@ -279,7 +279,7 @@ class http2pic
 	function isURLReachable($url)
 	{
 		$ch = curl_init($url);    
-		curl_setopt($ch, CURLOPT_NOBODY, true);
+		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);		
 		curl_exec($ch);
 		$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);