Update README.md

README.md

@@ -1,4 +1,4 @@
-## rabit: Reliable Allreduce and Broadcast Interface
+# Rabit: Reliable Allreduce and Broadcast Interface
 [![Build Status](https://travis-ci.org/dmlc/rabit.svg?branch=master)](https://travis-ci.org/dmlc/rabit)
 [![Documentation Status](https://readthedocs.org/projects/rabit/badge/?version=latest)](http://rabit.readthedocs.org/)
 
@@ -7,11 +7,10 @@ rabit is a light weight library that provides a fault tolerant interface of Allr
 * [Tutorial](guide)
 * [API Documentation](http://homes.cs.washington.edu/~tqchen/rabit/doc)
 * You can also directly read the [interface header](include/rabit.h)
-* [Distributed Machine Learning Tools](https://github.com/dmlc/wormhole)
-  - Rabit is one of the backbone library to support wormhole machine learning tools
+* [XGBoost](https://github.com/dmlc/xgboost)
+  - Rabit is one of the backbone library to support distributed XGBoost
 
-Features
-====
+## Features
 All these features comes from the facts about small rabbit:)
 * Portable: rabit is light weight and runs everywhere
   - Rabit is a library instead of a framework, a program only needs to link the library to run