removed outdated status information from README.md

README.md

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 coala
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-[![Project Status: Inactive – The project has reached a stable, usable state but is no longer being actively developed; support/maintenance will be provided as time allows.](https://www.repostatus.org/badges/latest/inactive.svg)](https://www.repostatus.org/#inactive)
-[![Linux Build Status](https://travis-ci.org/statgenlmu/coala.png?branch=master)](https://travis-ci.org/statgenlmu/coala) 
-[![Windows Build status](https://ci.appveyor.com/api/projects/status/uoduv0q64ddnqfva/branch/master?svg=true)](https://ci.appveyor.com/project/paulstaab/coala-02w83/branch/master)
-[![Coverage Status](https://coveralls.io/repos/statgenlmu/coala/badge.svg?branch=master)](https://coveralls.io/github/statgenlmu/coala)
-[![CRAN Status](http://www.r-pkg.org/badges/version/coala)](https://cran.r-project.org/package=coala)
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 Coala is an R package for simulating biological sequences according
 to a given model of evolution.  It can call a number of efficient 
 simulators based on