add manual link

README.md

@@ -2,6 +2,9 @@ webmagic
 ---
 [Readme in Chinese](https://github.com/code4craft/webmagic/tree/master/zh_docs)
 
+[User Manual (Chinese)](https://github.com/code4craft/webmagic/blob/master/webmagic%20manual.md)
+
+
 [![Build Status](https://travis-ci.org/code4craft/webmagic.png?branch=master)](https://travis-ci.org/code4craft/webmagic)
 
 >A scalable crawler framework. It covers the whole lifecycle of crawler: downloading, url management, content extraction and persistent. It can simplify the development of a  specific crawler.