Adding missing smarty plugin translate implementation

gulliver/includes/smarty_plugins/function.pmos.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * To implement pmos translation function on smarty templates
+ *
+ * example use:
+ *
+ *    <h1>{translate label="ID_HOME_TITLE"}</h1>
+ *
+ * @params $params mixed array containg all parameters passed from smarty plugin call
+ * @author Erik Amaru Ortiz <aortiz.erik@gmail.com, erik@colosa.com>
+ */
+
+function translate($params)
+{
+    if (array_key_exists('lang', $params)) {
+        $lang = $params['lang'];
+    } elseif (defined('SYS_LANG')) {
+        $lang = SYS_LANG;
+    } else {
+        $lang = 'en';
+    }
+
+    if (! array_key_exists('label', $params)) {
+       throw new Exception('Error: Param "label" is missing on "tranlate" smarty function, it should be called like: {translate label="SOME_LABEL_ID"}');
+    }
+
+    echo G::loadTranslation($params['label'], $lang);
+}