Merge pull request #222 from bitcoinjs/tip4commit

Add tip4commit

Author: weilu

README.md

@@ -1,6 +1,8 @@
 # BitcoinJS (bitcoinjs-lib)
 
-[![Build Status](https://travis-ci.org/bitcoinjs/bitcoinjs-lib.png?branch=master)](https://travis-ci.org/bitcoinjs/bitcoinjs-lib) [![Coverage Status](https://coveralls.io/repos/bitcoinjs/bitcoinjs-lib/badge.png)](https://coveralls.io/r/bitcoinjs/bitcoinjs-lib)
+[![Build Status](https://travis-ci.org/bitcoinjs/bitcoinjs-lib.png?branch=master)](https://travis-ci.org/bitcoinjs/bitcoinjs-lib)
+[![Coverage Status](https://coveralls.io/repos/bitcoinjs/bitcoinjs-lib/badge.png)](https://coveralls.io/r/bitcoinjs/bitcoinjs-lib)
+[![tip for next commit](http://tip4commit.com/projects/735.svg)](http://tip4commit.com/projects/735)
 
 [![NPM](https://nodei.co/npm/bitcoinjs-lib.png)](https://nodei.co/npm/bitcoinjs-lib/)