Add missing version.php and call it GeSHi v1.0.8.11-r1

The first part of the release is the geshi lib version the filter is currently
using. The second part is our own revision number.

lang/en/filter_geshi.php

@@ -1,3 +1,4 @@
 <?php
 
-$string['filtername'] = 'Geshi code highlighting filter';
+$string['filtername'] = 'GeSHi';
+$string['pluginname'] = 'GeSHi';

version.php

@@ -0,0 +1,30 @@
+<?php
+
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle 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 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * @package    filter_geshi
+ * @copyright  2005 Nigel McNie <[email protected]>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+$plugin->component = 'filter_geshi';
+$plugin->maturity = MATURITY_STABLE;
+$plugin->release = 'v1.0.8.11-r1';
+$plugin->version = 2014011000;
+$plugin->requires = 2011070100;