add linked in page

SiweiWang · SiweiWang · commit f58bb03ae764 · 2017-04-24T23:59:05.000-04:00
diff --git a/about.md b/about.md
@@ -4,4 +4,6 @@ title: About
 permalink: /about/
 ---
 
-I am current work as DevOps engineer building a fast data platform on Windows Azure
+I am current work as DevOps engineer building a fast data platform on Windows Azure.
+
+[LinkedIn](https://www.linkedin.com/in/siwei-wang-a70ba041/) profile 
