Photo to src

Move Photo to Friendica\Object namespace and replace require_once statments with use statements.

include/follow.php

@@ -8,13 +8,13 @@ use Friendica\Core\System;
 use Friendica\Core\Worker;
 use Friendica\Database\DBM;
 use Friendica\Network\Probe;
+use Friendica\Object\Photo;
 use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\OStatus;
 use Friendica\Protocol\PortableContact;
 
 require_once 'include/group.php';
 require_once 'include/salmon.php';
-require_once 'include/Photo.php';
 
 function update_contact($id) {
 	/*