Update README.md

thijse · web-flow · commit 03f309a79072 · 2017-02-23T22:33:25.000+01:00
diff --git a/README.md b/README.md
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 ArduinoLog - C++ Log library for Arduino devices
 ====================
+[![Build Status](https://travis-ci.org/thijse/Arduino-Log.svg?branch=master)](https://travis-ci.org/thijse/Arduino-Log)
 
 *An minimalistic Logging framework  for Arduino-compatible embedded systems.*
 
