added travis.ci badge

lgraubner · lgraubner · commit 96675b445ce6 · 2015-08-20T13:03:45.000+02:00
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 # Node W3C Validator
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+[![Build Status](https://travis-ci.org/lgraubner/node-w3c-validator.svg)](https://travis-ci.org/lgraubner/node-w3c-validator)
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 Crawls a given site and checks for W3C validity.
 
 ## Installation
