travis status use master branch

Author: akirasosa

README.md

@@ -1,6 +1,6 @@
 # Angular2 Tutorial
 
-[![Build Status][travis-image]][travis-url]
+[![Build Status](https://travis-ci.org/springboot-angular2-tutorial/angular2-app.svg?branch=master)](https://travis-ci.org/springboot-angular2-tutorial/angular2-app)
 [![Coverage Status](https://coveralls.io/repos/github/springboot-angular2-tutorial/angular2-app/badge.svg?branch=master)](https://coveralls.io/github/springboot-angular2-tutorial/angular2-app?branch=master)
 
 This repository is an example application for angular2 tutorial.

config/karma.conf.js

@@ -16,7 +16,6 @@ module.exports = function (config) {
     },
     remapCoverageReporter: {
       'text-summary': null,
-      json: './coverage/coverage.json',
       html: './coverage/html',
       lcovonly: './coverage/lcov.info',
     },