Show build status for master branch.

Author: octalmage

README.md

@@ -9,7 +9,7 @@ This is a work in progress so the exported functions could change at any time be
 
 [Check out some of the cool things people are making with  RobotJS](https://github.com/octalmage/robotjs/wiki/Projects-using-RobotJS)! Have your own rad RobotJS project? Feel free to add it!
 
-[![npm version](https://img.shields.io/npm/v/robotjs.svg)](https://www.npmjs.com/package/robotjs) [![Build Status](https://travis-ci.org/octalmage/robotjs.svg)](https://travis-ci.org/octalmage/robotjs) [![Ready](https://badge.waffle.io/octalmage/robotjs.svg?label=ready&title=Ready)](http://waffle.io/octalmage/robotjs) [![Join the chat at https://gitter.im/octalmage/robotjs](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/octalmage/robotjs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![npm version](https://img.shields.io/npm/v/robotjs.svg)](https://www.npmjs.com/package/robotjs) [![Build Status](https://api.travis-ci.org/octalmage/robotjs.svg?branch=master)](https://travis-ci.org/octalmage/robotjs) [![Ready](https://badge.waffle.io/octalmage/robotjs.svg?label=ready&title=Ready)](http://waffle.io/octalmage/robotjs) [![Join the chat at https://gitter.im/octalmage/robotjs](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/octalmage/robotjs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 ## Installing