Add single user security mode (#3)

- Tweaks to SQL column definitions
- Implement class autoloading
- Split user config into its own file

src/public/index.php

@@ -1,8 +1,10 @@
 <?php
 include '../start.php';
 
+Security::verifyUser();
+
 page_head('Welcome');
 ?>
-<p>Startup worked</p>
+<p>User ID <?=$_REQUEST['FRC_USER_ID']?> - e-mail <?=$_REQUEST['FRC_USER_EMAIL']?></p>
 <?php
 page_foot();