Reorganised code layout

Separated class library and web interface code
Added a common config/database config to be referenced by all
subprojects

Fixed previous commit

webui/pages/errors/unhandled-exception.php

@@ -0,0 +1,10 @@
+<?php
+
+$main   = HandBrakeCluster_Main::instance();
+$config = $main->config();
+
+$this->smarty->assign('display_exceptions', $config->get('debug.display_exceptions'));
+$this->smarty->assign('exception', $exception);
+$this->smarty->assign('exception_type', get_class($exception));
+
+?>