Update README.md

README.md

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 #  [Generalizations for the EL family](https://julianmendez.github.io/gel)
 
-[![Build Status](https://travis-ci.org/julianmendez/gel.png?branch=master)](https://travis-ci.org/julianmendez/gel)
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+[![build](https://travis-ci.org/julianmendez/gel.png?branch=master)](https://travis-ci.org/julianmendez/gel)
+[![maven central](https://maven-badges.herokuapp.com/maven-central/de.tu-dresden.inf.lat.gel/gel/badge.svg)](https://search.maven.org/#search|ga|1|g%3A%22de.tu-dresden.inf.lat.gel%22)
+[![license](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://www.apache.org/licenses/LICENSE-2.0.txt)
 
 This project implements generalization algorithms (role-depth bounded least common subsumer and most specific concept) for the description logics EL and extensions thereof.