Update readme with basic info

README.md

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-# pir-serious-game-ethics
+# PIR Serious Game on Ethics
 
- 
+A serious game about digital ethics.
+
+## Team
+* Abir Benazzouz
+* Arnaud Vergnet
+* Auriane Lartigue
+* Clémentine Bonneau
+* Élise Barnabé
+* Morgane Foussats
+* Nabil Moukhlis
+
+## Technologies
+
+This game is made with [Godot 3.2](https://godotengine.org), with the help of the [EXP Godot Dialog System](https://github.com/EXPWorlds/Godot-Dialog-System) by David Lipps.
+
+## License
+
+This is a Free and Open-Source game licensed under GPLv3.