add npm, travis, coveralls and david badges

.travis.yml

@@ -0,0 +1,7 @@
+language: node_js
+node_js:
+  - "4.1"
+  - "4.0"
+script:
+  - npm run test
+  - npm run coveralls

README.md

@@ -1,6 +1,12 @@
 koa-joi
 =======
 
+[![NPM version][npm-image]][npm-url]
+[![Build Status][travis-image]][travis-url]
+[![Coverage Status][coveralls-image]][coveralls-url]
+[![Dependency Status][dep-image]][dep-url]
+[![devDependency Status][devDep-image]][devDep-url]
+
 Joi validation koa middleware
 
 # Installation
@@ -26,3 +32,14 @@ router.post('/user', validate({
 }));
 
 ```
+
+[npm-image]: https://img.shields.io/npm/v/koa-joi.svg
+[npm-url]: https://www.npmjs.com/package/koa-joi
+[travis-image]: https://img.shields.io/travis/pierreinglebert/koa-joi/master.svg?label=Linux%20build
+[travis-url]: https://travis-ci.org/pierreinglebert/koa-joi
+[coveralls-image]: https://img.shields.io/coveralls/pierreinglebert/koa-joi.svg
+[coveralls-url]: https://coveralls.io/r/pierreinglebert/koa-joi?branch=master
+[dep-image]: https://img.shields.io/david/pierreinglebert/koa-joi.svg
+[dep-url]: https://david-dm.org/pierreinglebert/koa-joi
+[devDep-image]: https://img.shields.io/david/dev/pierreinglebert/koa-joi.svg
+[devDep-url]: https://david-dm.org/pierreinglebert/koa-joi#info=devDependencies

package.json

@@ -4,8 +4,9 @@
   "description": "Joi validation middleware",
   "main": "index.js",
   "scripts": {
-    "test": "istanbul cover --root . node_modules/mocha/bin/_mocha --",
-    "posttest": "eslint ."
+    "coveralls": "coveralls < ./coverage/lcov.info",
+    "pretest": "eslint .",
+    "test": "istanbul cover --root . node_modules/mocha/bin/_mocha --"
   },
   "repository": {
     "type": "git",
@@ -22,6 +23,7 @@
   },
   "homepage": "https://github.com/pierreinglebert/koa-joi",
   "devDependencies": {
+    "coveralls": "^2.11.2",
     "eslint": "1.10.1",
     "istanbul": "~0.4.2",
     "joi": "7.2.0",