Update README.md

GangZhuo · web-flow · commit 57c65fcc09ea · 2016-09-10T11:47:41.000+08:00
diff --git a/README.md b/README.md
@@ -1 +1,6 @@
-# TrafficStatistics
+# TrafficStatistics
+
+[![Build Status]][Appveyor]
+
+[Appveyor]: https://ci.appveyor.com/project/GangZhuo/TrafficStatistics/branch/master
+[Build Status]: https://ci.appveyor.com/api/projects/status/j81h4nforlmym2n5?svg=true
