📝 update README

README.md

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 # double-pendulum :computer::triangular_ruler::chart_with_upwards_trend:
+[![Release](https://img.shields.io/github/release/gforien/double-pendulum.svg)](https://github.com/gforien/double-pendulum/releases)
+![Code quality](https://img.shields.io/badge/MATLAB%20analyzer-0%20messages-brightgreen.svg)
+[![License](https://img.shields.io/badge/License-MIT-blue.svg)](https://github.com/gforien/double-pendulum/blob/master/LICENSE)
 ### Exhaustive numerical simulation of the double pendulum in Matlab
 
+![Screenshot](screenshot.gif)
+
 #
-##### Rémi Bacot, Gabriel Forien, Mariem Ksouri, Agathe Menon, Pierre-Adrien Millot 
+#### Rémi Bacot, Gabriel Forien, Mariem Ksouri, Agathe Menon, Pierre-Adrien Millot 
 <br/>P2I7 - Modélisation numérique pour l'ingénieur - Sujet 8
 <br/>PCC2A INSA Lyon 2018
-![Logo INSA Lyon](https://upload.wikimedia.org/wikipedia/commons/b/b9/Logo_INSA_Lyon_%282014%29.svg)
+<br />![Logo INSA Lyon](https://upload.wikimedia.org/wikipedia/commons/b/b9/Logo_INSA_Lyon_%282014%29.svg)