ownCloud new package (with built-in RainLoop Webmail)

Remove VERSION file dependence.
Small fixes

build/owncloud/rainloop-app/index-admin.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * ownCloud - RainLoop mail plugin
+ *
+ * @author RainLoop Team
+ * @copyright 2014 RainLoop Team
+ *
+ * https://github.com/RainLoop/rainloop-webmail/tree/master/build/owncloud
+ */
+
+OCP\User::checkAdminUser();
+OCP\App::checkAppEnabled('rainloop');
+OCP\App::setActiveNavigationEntry('rainloop_index_admin');
+
+$sUrl = OCP\Util::linkTo('apps/rainloop/app', 'index.php');
+$sResultUrl = $sUrl.'?admin';
+
+$oTemplate = new OCP\Template('rainloop', 'iframe', 'user');
+$oTemplate->assign('rainloop-url', $sResultUrl);
+
+$oTemplate->printpage();