add a lib directory; move smarty into it; add random_compat phar (for random_bytes() on PHP < 7)

lib/smarty/libs/plugins/modifier.replace.php

@@ -0,0 +1,39 @@
+<?php
+/**
+ * Smarty plugin
+ *
+ * @package    Smarty
+ * @subpackage PluginsModifier
+ */
+
+/**
+ * Smarty replace modifier plugin
+ * Type:     modifier
+ * Name:     replace
+ * Purpose:  simple search/replace
+ *
+ * @link   http://smarty.php.net/manual/en/language.modifier.replace.php replace (Smarty online manual)
+ * @author Monte Ohrt <monte at ohrt dot com>
+ * @author Uwe Tews
+ *
+ * @param string $string  input string
+ * @param string $search  text to search for
+ * @param string $replace replacement text
+ *
+ * @return string
+ */
+function smarty_modifier_replace($string, $search, $replace)
+{
+    static $is_loaded = false;
+    if (Smarty::$_MBSTRING) {
+        if (!$is_loaded) {
+            if (!is_callable('smarty_mb_str_replace')) {
+                require_once(SMARTY_PLUGINS_DIR . 'shared.mb_str_replace.php');
+            }
+            $is_loaded = true;
+        }
+         return smarty_mb_str_replace($search, $replace, $string);
+    }
+
+    return str_replace($search, $replace, $string);
+}