[Visitor] Started the basic code structure of the controller

The visitor controller will handle allowing the public to see a logbook and some of its data.

application/controllers/Visitor.php

@@ -0,0 +1,47 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+class Visitor extends CI_Controller {
+
+	function __construct()
+	{
+		parent::__construct();
+	}
+
+    function _remap($method) {
+        if($method == "config") {
+            $this->$method();
+        }
+        else {
+            $this->index($method);
+        }
+    }
+
+	/*
+        This is the default function that is called when the user visits the root of the public controller
+    */
+	public function index($public_slug = NULL)
+	{
+
+        // If environment is set to development then show the debug toolbar
+		if(ENVIRONMENT == 'development') {
+            $this->output->enable_profiler(TRUE);
+        }
+
+        // Check slug passed and is valid
+        if ($this->security->xss_clean($public_slug, TRUE) === FALSE)
+        {
+            // file failed the XSS test#
+            log_message('error', '[Visitor] XSS Attack detected on public_slug '. $public_slug);
+            show_404('Unknown Public Page.');
+        } else {
+            // Checked slug passed and clean
+            log_message('info', '[Visitor] public_slug '. $public_slug .' loaded');
+
+            echo $public_slug = $this->security->xss_clean($public_slug);
+
+            // Check if the slug is contained in the station_logbooks table
+            
+        }
+	}
+	
+}