Rename theme callback helpers from xxx_block to xxx_theme to make room

for us to rename the dashboard helper to be a block helper since
sidebar blocks are not just in the dashboard.

modules/slideshow/helpers/slideshow_theme.php

@@ -0,0 +1,25 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2008 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class slideshow_theme_Core {
+  static function head($theme) {
+    return "<script src=\"http://lite.piclens.com/current/piclens.js\" type=\"text/javascript\">" .
+      "</script>";
+  }
+}