add travis

1. add travis.yml
2. Update README.md and README-zh.md

.travis.yml

@@ -0,0 +1,16 @@
+sudo: false
+os:
+  - linux
+  - osx
+language: node_js
+install: npm install
+script: npm test
+after_script: npm run coverage
+env:
+  global:
+    - NODE_ENV=travis 
+node_js:
+  - node
+  - '8'
+  - '7'
+  - '6'

README-zh.md

@@ -1,4 +1,10 @@
-# Promise-unified [![npm](https://img.shields.io/npm/dy/promise-unified.svg)](https://www.npmjs.com/package/promise-unified) [![npm](https://img.shields.io/github/issues/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/github/forks/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/github/stars/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/BlackHole1/all-equal)
+# Promise-unified
+[![Node Version](https://img.shields.io/badge/node.js-%3E=_6-green.svg)](https://travis-ci.org/BlackHole1/promise-unified)
+[![Build Status](https://travis-ci.org/BlackHole1/promise-unified.svg?branch=master)](https://travis-ci.org/BlackHole1/promise-unified)
+[![Coverage Status](https://coveralls.io/repos/github/BlackHole1/promise-unified/badge.svg?branch=master)](https://coveralls.io/github/BlackHole1/promise-unified?branch=master)
+[![Npm Downlaod](https://img.shields.io/npm/dy/promise-unified.svg)](https://www.npmjs.com/package/promise-unified)
+
+[![NPM](https://nodei.co/npm/promise-unified.png?downloads=true&downloadRank=true&stars=true)](https://nodei.co/npm/promise-unified/)
 
 [English description](https://github.com/BlackHole1/promise-unified/README.md)
 

README.md

@@ -1,4 +1,10 @@
-# Promise-unified [![npm](https://img.shields.io/npm/dy/promise-unified.svg)](https://www.npmjs.com/package/promise-unified) [![npm](https://img.shields.io/github/issues/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/github/forks/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/github/stars/BlackHole1/promise-unified.svg)](https://github.com/BlackHole1/all-equal) [![npm](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/BlackHole1/all-equal)
+# Promise-unified
+[![Node Version](https://img.shields.io/badge/node.js-%3E=_6-green.svg)](https://travis-ci.org/BlackHole1/promise-unified)
+[![Build Status](https://travis-ci.org/BlackHole1/promise-unified.svg?branch=master)](https://travis-ci.org/BlackHole1/promise-unified)
+[![Coverage Status](https://coveralls.io/repos/github/BlackHole1/promise-unified/badge.svg?branch=master)](https://coveralls.io/github/BlackHole1/promise-unified?branch=master)
+[![Npm Downlaod](https://img.shields.io/npm/dy/promise-unified.svg)](https://www.npmjs.com/package/promise-unified)
+
+[![NPM](https://nodei.co/npm/promise-unified.png?downloads=true&downloadRank=true&stars=true)](https://nodei.co/npm/promise-unified/)
 
 [中文说明](https://github.com/BlackHole1/promise-unified/blob/master/README-zh.md)