test ajout surnom
Merge branch 'dev_test_merged' of https://github.com/JavaClientServer/JavaServeurClient into dev_test_merged

Conflicts:
	src/client/Client.java
Merge branch 'dev_test_merged' of https://github.com/JavaClientServer/JavaServeurClient into dev_test_merged

Conflicts:
	src/client/Client.java
decoupage du client en plusieurs classes
amélioration (commande user)