Add Contact Object

- Add Profile Object
- Add User Model
- Add use statements

mod/cal.php

@@ -11,6 +11,7 @@ use Friendica\Core\Config;
 use Friendica\Core\PConfig;
 use Friendica\Core\System;
 use Friendica\Database\DBM;
+use Friendica\Object\Contact;
 
 require_once('include/event.php');
 require_once('include/redir.php');