README.md in tee_logger-2.3.0 vs README.md in tee_logger-2.3.1

- old
+ new
@@ -1,12 +1,14 @@
 [![Gem Version](https://badge.fury.io/rb/tee_logger.svg)](http://badge.fury.io/rb/tee_logger)
 [![Build Status](https://travis-ci.org/k-ta-yamada/tee_logger.svg)](https://travis-ci.org/k-ta-yamada/tee_logger)
+[![Code Climate](https://codeclimate.com/github/k-ta-yamada/tee_logger/badges/gpa.svg)](https://codeclimate.com/github/k-ta-yamada/tee_logger)
+[![Test Coverage](https://codeclimate.com/github/k-ta-yamada/tee_logger/badges/coverage.svg)](https://codeclimate.com/github/k-ta-yamada/tee_logger/coverage)
 
 > Sorry, I changed Usage from version 2.0.0
 
 - [Rubygems.org](https://rubygems.org/gems/tee_logger)
 - [GitHub](https://github.com/k-ta-yamada/tee_logger)
-- [RubyDoc.info](http://www.rubydoc.info/gems/tee_logger/2.2.0)
+- [RubyDoc.info](http://www.rubydoc.info/gems/tee_logger)
 
 # TeeLogger
 
 logging to file and standard output.
 require standard library only.