README.md in useragent-0.12.0 vs README.md in useragent-0.13.0

- old
+ new

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 # UserAgent
 
 [![Build Status](https://travis-ci.org/gshutler/useragent.svg?branch=master)](https://travis-ci.org/gshutler/useragent)
+[![Gem Version](https://badge.fury.io/rb/useragent.svg)](http://badge.fury.io/rb/useragent)
 
 UserAgent is a Ruby library that parses and compares HTTP User Agents.
 
 ## Installation
 