Update README.md

Author: bdestombe

README.md

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 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.573584.svg)](https://doi.org/10.5281/zenodo.573584)
-[![Build Status](https://travis-ci.com/bdestombe/python-flopy-parser.svg?branch=master)](https://travis-ci.com/bdestombe/python-flopy-parser)
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 # Table of Content
 - [Use Cases](#use-cases)
 - [Highlights](#highlights)