Update README.md with Travis CI build badge for master branch

Author: tofi86

README.md

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 universalJavaApplicationStub
 ============================
 
-[![Current release](https://img.shields.io/github/release/tofi86/universalJavaApplicationStub.svg)](https://github.com/tofi86/universalJavaApplicationStub/releases) [![Join the chat at https://gitter.im/tofi86/universalJavaApplicationStub](https://badges.gitter.im/tofi86/universalJavaApplicationStub.svg)](https://gitter.im/tofi86/universalJavaApplicationStub?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Build Status](https://travis-ci.org/tofi86/universalJavaApplicationStub.svg?branch=master)](https://travis-ci.org/tofi86/universalJavaApplicationStub) [![Current release](https://img.shields.io/github/release/tofi86/universalJavaApplicationStub.svg)](https://github.com/tofi86/universalJavaApplicationStub/releases) [![Join the chat at https://gitter.im/tofi86/universalJavaApplicationStub](https://badges.gitter.im/tofi86/universalJavaApplicationStub.svg)](https://gitter.im/tofi86/universalJavaApplicationStub?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 A BASH based *JavaApplicationStub* for Java Apps on Mac OS X that works with both Apple's and Oracle's plist format. It is released under the [MIT License](https://github.com/tofi86/universalJavaApplicationStub/blob/master/LICENSE).