updated README. added jenkins build status
# Crawlab
+![](http://114.67.75.98:8081/job/crawlab/job/develop/badge/icon)
![](https://img.shields.io/badge/version-v0.2.1-blue.svg)
<a href="https://github.com/tikazyq/crawlab/blob/master/LICENSE" target="_blank">
<img src="https://img.shields.io/badge/License-BSD-blue.svg">
