Update README.md

coderhs · coderhs · commit 8189f78ebfd7 · 2015-09-02T13:57:21.000+05:30
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 ## A ruby wrapper for Open Weather Map API.
 
+[![Build Status](https://travis-ci.org/coderhs/ruby_open_weather_map.svg?branch=master)](https://travis-ci.org/coderhs/ruby_open_weather_map)
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 ## Installation
 
 Latest version `0.11.0`
