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README.md

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 viper [![Build Status](https://travis-ci.org/spf13/viper.svg)](https://travis-ci.org/spf13/viper)
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+[![Join the chat at https://gitter.im/spf13/viper](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/spf13/viper?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
 Go configuration with fangs
 
 ## What is Viper?