Add search index (#15)

- Add utility rebuild script
- Add Search to header
- Add shell of search page
- Add search query support to ItemList

src/public/search.php

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * Item Search Page
+ *
+ * Search for items across all feeds
+ */
+
+include '../start.php';
+
+$db = Data::getConnection();
+Security::verifyUser($db);
+
+if (key_exists('search', $_GET)) {
+    $list = ItemList::matchingSearch($_GET['search'], $db);
+}
+
+page_head('Item Search'); ?>
+<h1>Item Search</h1>
+// TODO: search form <?php
+if (isset($list)) $list->render();
+page_foot();
+$db->close();