update travis badge

Author: adavidw

README.md

@@ -1,6 +1,6 @@
 # Authorize.Net Java SDK
 
-[![Travis](https://img.shields.io/travis/AuthorizeNet/sdk-java/master.svg)](https://travis-ci.org/AuthorizeNet/sdk-java)
+[![Travis CI Status](https://travis-ci.org/AuthorizeNet/sdk-java.svg?branch=master)](https://travis-ci.org/AuthorizeNet/sdk-java)
 [![Code Climate](https://codeclimate.com/github/AuthorizeNet/sdk-java/badges/gpa.svg)](https://codeclimate.com/github/AuthorizeNet/sdk-java)
 [![Maven Central](https://img.shields.io/maven-central/v/net.authorize/anet-java-sdk.svg?style=flat)](http://mvnrepository.com/artifact/net.authorize/anet-java-sdk)