Remove travis thing until I figure it out.

README.md

 dataRetrieval
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-[![Build Status](https://travis-ci.org/ldecicco-USGS/dataRetrieval.png?branch=master)](https://travis-ci.org/USGS-R/dataRetrieval)
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 R package source for data retrieval specifically for the EGRET R package:
 
 Please visit the EGRET wiki for more information: