Replace strings elgalu with your github user and boolean_class with your github repo name. Memo copy from http://elgalu.github.io/2013/add-achievement-badges-to-your-gem-readme

badges

# TODO: Your gem name

[![Gem Version][GV img]][Gem Version]
[![Build Status][BS img]][Build Status]
[![Dependency Status][DS img]][Dependency Status]
[![Code Climate][CC img]][Code Climate]
[![Coverage Status][CS img]][Coverage Status]

## Description

TODO: Your gem description

[Gem Version]: https://rubygems.org/gems/boolean_class
[Build Status]: https://travis-ci.org/elgalu/boolean_class
[travis pull requests]: https://travis-ci.org/elgalu/boolean_class/pull_requests
[Dependency Status]: https://gemnasium.com/elgalu/boolean_class
[Code Climate]: https://codeclimate.com/github/elgalu/boolean_class
[Coverage Status]: https://coveralls.io/r/elgalu/boolean_class

[GV img]: https://badge.fury.io/rb/boolean_class.png
[BS img]: https://travis-ci.org/elgalu/boolean_class.png
[DS img]: https://gemnasium.com/elgalu/boolean_class.png
[CC img]: https://codeclimate.com/github/elgalu/boolean_class.png
[CS img]: https://coveralls.io/repos/elgalu/boolean_class/badge.png?branch=master