Added coverage shield

.travis.yml

@@ -1,3 +1,5 @@
 language: node_js
 node_js:
-  - 4.2.0
+  - 4.2.0
+script: "npm run test-lcov"
+after_script: "npm install coveralls && cat ./coverage/lcov.info | coveralls"

README.md

@@ -4,6 +4,7 @@ A Framework for creating Amazon Echo (Alexa) skills using Node.js
 
   [![NPM Version][npm-image]][npm-url]
   [![Build Status][travis-image]][travis-url]
+  [![Coverage Status][coveralls-image]][coveralls-url]
 
 ```javascript
 const alexia = require('alexia');
@@ -345,3 +346,5 @@ For more information refer to general guide [Contributing to Open Source](https:
   [npm-url]: https://npmjs.org/package/alexia
   [travis-image]: https://img.shields.io/travis/Accenture/alexia/master.svg
   [travis-url]: https://travis-ci.org/Accenture/alexia
+  [coveralls-image]: https://coveralls.io/repos/github/Accenture/alexia/badge.svg?branch=master
+  [coveralls-url]: https://coveralls.io/github/Accenture/alexia?branch=master

package.json

@@ -21,6 +21,7 @@
     "lint": "eslint .",
     "lint:fix": "npm run lint -- --fix",
     "test": "istanbul cover node_modules/mocha/bin/_mocha -- -u exports --reporter spec",
+    "test-lcov": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- -u exports --reporter spec",
     "test:dev": "nodemon --exec \"mocha || true\""
   },
   "dependencies": {