Adding new placeholder "Default" theme

Bug 1465107: Use Bootstrap CSS Framework
When Yvonne creates a new Default theme, we can place it here.

Change-Id: Ic7b917e5987032ae4d5949b0bfb2f94f1abcca33

htdocs/theme/default/themeconfig.php

+<?php
+/**
+ *
+ * @package    mahara
+ * @subpackage core
+ * @author     Catalyst IT Ltd
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL version 3 or later
+ * @copyright  For copyright information on Mahara, please see the README file distributed with this software.
+ */
+
+$theme = new stdClass();
+
+$theme->displayname = 'Default';
+/* Set parent to boolean FALSE  to specify the theme has no parent */
+$theme->parent      = 'raw';
+
+/**
+ * The following themeconfig options are available. If you make new themeconfig
+ * options please add them here and explain what they do.
+ */
+
+/* Allow skins to be used on this theme */
+$theme->skins = true;
+
+/* Limit this theme to certain institutions */
+// $theme->institutions = array('institution_a', 'institution_b');
\ No newline at end of file

htdocs/theme/raw/themeconfig.php

@@ -10,7 +10,7 @@
 
 $theme = new StdClass;
 
-$theme->displayname  = 'Bootstrap';
+$theme->displayname  = 'Raw';
 $theme->formrenderer = 'div';
 $theme->parent      = false;