Add codecov badge

.travis.yml

@@ -2,6 +2,8 @@ os:
   - linux
   - osx
 language: node_js
+install:
+  - npm install -g codecov
 node_js:
   - "node"
   - "iojs"
@@ -17,3 +19,7 @@ node_js:
   - "0.11"
 branches:
   only: master
+script:
+  - npm install
+  - node ./node_modules/istanbul/lib/cli.js cover tests/runTests.js
+  - if ! [[ $(node --version) =~ v3.3.1|v0.11|v0.12 ]]; then codecov; else echo no codecov; fi;

README.md

@@ -4,6 +4,8 @@ Node JS directory compare
 
 [![Build Status](https://api.travis-ci.org/gliviu/dir-compare.svg?branch=master)](https://travis-ci.org/gliviu/dir-compare)
 [![Build status](https://ci.appveyor.com/api/projects/status/fpnqkr2gfg7pwkxk/branch/master?svg=true)](https://ci.appveyor.com/project/gliviu/dir-compare)
+[![codecov.io](http://codecov.io/github/gliviu/dir-compare/coverage.svg?branch=master)](http://codecov.io/github/gliviu/dir-compare?branch=master)
+
 
 ## Installation
 ```shell