First cut of log on page (#9)

- Add session support
- Refactor security handling to use db connection
- Fix db path issue

src/public/index.php

@@ -7,9 +7,8 @@
 
 include '../start.php';
 
-Security::verifyUser();
-
 $db = Data::getConnection();
+Security::verifyUser($db);
 
 if (array_key_exists('refresh', $_GET)) {
     $refreshResult = Feed::refreshAll($db);