Create some basic infrastructure:

* item model (contains basic item info, similar to the gx version)
  * module model (has info about each module and which version of it is installed)
  * added a very basic unit test to verify that we can create an instance of item
  * Updated our test controller to require a unit_test db config and
    call core::install if it hasn't been done already.

New pattern:
  * core/helpers/core_installer.php creates core_installer helper.
    When we install a new module you call xxx_installer::install(),
    and when you want it to go away, you do xxx_installer::uninstall()

Create

core/models/module.php

@@ -0,0 +1,21 @@
+<?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 Module_Model extends ORM {
+}