update doc

README.md

-# <img src="https://cmljs.org/doc/assets/100*100.png"/> Chameleon [![Build Status](https://www.travis-ci.org/didi/chameleon.svg?branch=master)](https://www.travis-ci.org/didi/chameleon)
+# <img src="https://cmljs.org/doc/assets/100*100.png"/> Chameleon [![Build Status](https://www.travis-ci.org/didi/chameleon.svg?branch=master)](https://www.travis-ci.org/didi/chameleon) [![license](https://img.shields.io/npm/l/chameleon-tool.svg?registry_uri=https%3A%2F%2Fregistry.npmjs.com&style=popout-square)](https://www.npmjs.com/package/chameleon-tool) [![version](https://img.shields.io/npm/v/chameleon-tool.svg?style=flat)](https://www.npmjs.com/package/chameleon-tool) 
 
 
 **Chameleon**/kəˈmiːlɪən/，简写`CML`，中文名`卡梅龙`；中文意思`变色龙`，意味着就像变色龙一样能适应不同环境的跨端整体解决方案。