Add Contact Object

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

src/Worker/Notifier.php

@@ -9,6 +9,7 @@ use Friendica\Core\Config;
 use Friendica\Core\Worker;
 use Friendica\Database\DBM;
 use Friendica\Network\Probe;
+use Friendica\Object\Contact;
 use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\OStatus;
 use dba;