add experimental easy installer

prefs.php

@@ -1,7 +1,17 @@
 <?php
+	if (file_exists("install") && !file_exists("config.php")) {
+		header("Location: install/");
+	}
+
 	set_include_path(dirname(__FILE__) ."/include" . PATH_SEPARATOR .
 		get_include_path());
 
+	if (!file_exists("config.php")) {
+		print "<b>Fatal Error</b>: You forgot to copy
+		<b>config.php-dist</b> to <b>config.php</b> and edit it.\n";
+		exit;
+	}
+
 	require_once "sessions.php";
 	require_once "functions.php";
 	require_once "sanity_check.php";