Update links to new Gitter room

README.md

-# java [![Build Status](https://travis-ci.org/exercism/java.svg?branch=master)](https://travis-ci.org/exercism/java) [![Join the chat at https://gitter.im/exercism/xjava](https://badges.gitter.im/exercism/java.svg)](https://gitter.im/exercism/xjava?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+# java [![Build Status](https://travis-ci.org/exercism/java.svg?branch=master)](https://travis-ci.org/exercism/java) [![Join the chat at https://gitter.im/exercism/xjava](https://badges.gitter.im/exercism/java.svg)](https://gitter.im/exercism/java?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 Source for Exercism Exercises in Java.
 
 
 This guide covers contributing to the Java track.  If you are new, this guide is for you.
 
-If, at any point, you're having any trouble, pop in the [Gitter exercism/dev room](https://gitter.im/exercism/dev) for help.
+If, at any point, you're having any trouble, pop in the [Gitter exercism/java room](https://gitter.im/exercism/java) or the [Gitter exercism/dev room](https://gitter.im/exercism/dev) for help.
 
 ## Contributing With Minimal Setup