README.md in omniauth-mediawiki-0.0.3 vs README.md in omniauth-mediawiki-0.0.4

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 # OmniAuth Mediawiki
 
 
+[![Gem Version](https://badge.fury.io/rb/omniauth-mediawiki.svg)](https://badge.fury.io/rb/omniauth-mediawiki)
+
 This gem contains the MediaWiki strategy for OmniAuth.
 
 MediaWiki uses the OAuth 1.0a extension, you can read about it here: https://www.mediawiki.org/wiki/Extension:OAuth
 
 ## How To Use It