目录结构更新，增加composer支持

application/extra/captcha.php

@@ -0,0 +1,18 @@
+<?php
+// +----------------------------------------------------------------------
+// | SentCMS [ WE CAN DO IT JUST THINK IT ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2013 http://www.tensent.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Author: molong <molong@tensent.cn> <http://www.tensent.cn>
+// +----------------------------------------------------------------------
+
+return [
+    // 验证码字体大小
+    'fontSize'    =>    25,    
+    // 验证码位数
+    'length'      =>    3,   
+    // 关闭验证码杂点
+    'useNoise'    =>    false,
+    'useZh'       =>    true
+];