Update README.md

Author: Daniel Tolbert

README.md

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 PHP Client library for Bandwidth's Phone Number Dashboard (AKA: Dashboard, Iris)
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-[![Build Status](https://travis-ci.org/bandwidth/php-bandwidth-iris.svg?branch=master)](https://travis-ci.org/bandwidth/php-bandwidth-iris)
+[![Build Status](https://travis-ci.org/Bandwidth/php-bandwidth-iris.svg?branch=master)](https://travis-ci.org/Bandwidth/php-bandwidth-iris)
 
 ## Install