Implemented plugin architecture.

plugins/modifier.replace.php

@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * Smarty plugin
+ * -------------------------------------------------------------
+ * Type:     modifier
+ * Name:     replace
+ * Purpose:  simple search/replace
+ * -------------------------------------------------------------
+ */
+function smarty_modifier_replace($string, $search, $replace)
+{
+    return str_replace($search, $replace, $string);
+}
+
+/* vim: set expandtab: */
+
+?>