README.md in concurrent_worker-0.3.3 vs README.md in concurrent_worker-0.4.0

- old
+ new

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 # ConcurrentWorker
+[![Build Status](https://travis-ci.org/dddogdiamond/concurrent_worker.svg?branch=master)](https://travis-ci.org/dddogdiamond/concurrent_worker)
+[![Code Climate](https://codeclimate.com/github/dddogdiamond/concurrent_worker/badges/gpa.svg)](https://codeclimate.com/github/dddogdiamond/concurrent_worker)
+[![Gem Version](https://badge.fury.io/rb/concurrent_worker.svg)](http://badge.fury.io/rb/concurrent_worker)
+[![MIT License](http://img.shields.io/github/license/dddogdiamond/concurrent_worker.svg)](LICENSE.txt)
 
 Concurrent worker in thread/process with preparation mechanism.
 
 ## Installation
 