Added powercode support - no icon for now, using linux

includes/discovery/os/powercode.inc.php

@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * LibreNMS
+ *
+ * Copyright (c) 2014 Neil Lathwood <https://github.com/laf/ http://www.lathwood.co.uk/fa>
+ *
+ * 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 3 of the License, or (at your
+ * option) any later version.  Please see LICENSE.txt at the top level of
+ * the source code distribution for details.
+ */
+
+//sysDescr.0 = STRING: Powercode BMU
+
+if (!$os) {
+    if (stristr($sysDescr, "Powercode MBU")) {
+        $os = "powercode";
+    }
+}
+