Update README.md

Che Kun · Che Kun · commit e5678b49dc91 · 2014-05-15T13:52:48.000+08:00
diff --git a/README.md b/README.md
@@ -1,5 +1,7 @@
 # php wrapper for [httpsqs](http://code.google.com/p/httpsqs/)
 
+[![Build Status](https://travis-ci.org/chekun/httpsqs.svg?branch=master)](https://travis-ci.org/chekun/httpsqs)
+
 # How to use
 
 ```php
@@ -17,4 +19,4 @@
     $queue->reset();
     //set queue max length
     $queue->maxQueue($length = 10000);
-```
+```
