Update badge url with the one specific for github

Author: evilaliv3

Gruntfile.js

@@ -66,7 +66,7 @@ module.exports = function(grunt) {
         },
         coverageReporter: {
           type: "lcov",
-          dir: "coverage/"
+          dir: "coverage"
         },
         // global config for SauceLabs
         sauceLabs: {

README.md

@@ -1,4 +1,4 @@
-# ng-flow [![Build Status](https://travis-ci.org/flowjs/ng-flow.svg)](https://travis-ci.org/flowjs/ng-flow) [![Coverage Status](https://coveralls.io/repos/flowjs/ng-flow/badge.svg?branch=master)](https://coveralls.io/r/flowjs/ng-flow?branch=master)
+# ng-flow [![Build Status](https://travis-ci.org/flowjs/ng-flow.svg)](https://travis-ci.org/flowjs/ng-flow) [![Coverage Status](https://coveralls.io/repos/flowjs/ng-flow/badge.svg?branch=master&service=github)](https://coveralls.io/github/flowjs/ng-flow?branch=master)
 
 [![Saucelabs Test Status](https://saucelabs.com/browser-matrix/ng-flow.svg)](https://saucelabs.com/u/ng-flow)