add LICENSE

README.md

 # Ğecko
 
-Ğecko is a transaction client written in Dart. It is fast and secure thanks to native code compilation, Rust cryptography bindings and Duniter's new GraphQL API (GVA). It is not intended to manage member accounts, but rather simple wallets.
+Ğecko is a transaction client owned by [Axiom-Team association] and written in Dart. It is fast and secure thanks to native code compilation, Rust cryptography bindings and Duniter's new GraphQL API (GVA). It is not intended to manage member accounts, but rather simple wallets.
 
 The development is quite early, you can participate in the discussion [on the Duniter forum](https://forum.duniter.org/t/gecko-nouveau-client-de-paiements-1-sur-mobile-en-cours-de-developpement-dart-flutter/7857) (mostly FR)
 
+[Axiom-Team association]: https://axiom-team.fr/
+
 ## Getting Started
 
 <div align="center">

lib/main.dart

+//  Copyright (C) 2020 Axiom-Team.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 import 'dart:async';
 import 'package:flutter/services.dart';
 import 'package:gecko/globals.dart';