+ add the convert tools for opt to ext.

bin/convertopt.php

@@ -0,0 +1,18 @@
+<?php
+/**
+ * This file is used to convert the old opt directory to ext.
+ */
+$modules = glob('../module/*');
+foreach($modules as $module)
+{
+    $modulePath = realpath($module) . '/';
+    $moduleOpt  = $modulePath . 'opt';
+    $moduleExt  = $modulePath . 'ext';
+    if(file_exists($moduleOpt))
+    {
+        echo "Processing $module ... ";
+        $result = @rename($moduleOpt, $moduleExt);
+        print($result ? ' done' : ' fail');
+        echo "\n";
+    }
+}