fixes #209 added setting default timezone to UTC in case it's not set via php.ini

apps/bootstrap/index.php

@@ -1,4 +1,8 @@
 <?php
+if(!ini_get('date.timezone')) {
+	date_default_timezone_set('UTC');
+}
+
 // comment out the following line to disable debug mode
 defined('YII_DEBUG') or define('YII_DEBUG', true);