Migrate everything on Gradle

Also added tasks to run the server & client separately

ChatApp/app/src/main/java/client/Client.java

@@ -0,0 +1,53 @@
+package client;
+
+import java.net.DatagramSocket;
+import java.net.InetSocketAddress;
+import java.net.SocketException;
+
+import network.protocol.packets.*;
+
+public class Client {
+
+	private final ClientConnexion connexion;
+	private final ClientListener callback;
+
+	public Client(InetSocketAddress serverAddress, ClientListener callback, String pseudo) throws SocketException {
+		this.connexion = new ClientConnexion(new DatagramSocket(), serverAddress, callback);
+		this.callback = callback;
+		login(pseudo);
+	}
+
+	public void close() {
+		this.connexion.sendPacket(new DisconnectPacket("Leaving"));
+		this.connexion.close();
+		this.callback.handleDisconnect();
+	}
+
+	private void login(String pseudo) {
+		this.connexion.sendPacket(new LoginPacket(pseudo));
+	}
+
+	public void SendChatMessage(String message) {
+		this.connexion.sendPacket(new SendChatMessagePacket(message));
+	}
+
+	public void SendCreateRoom(String roomName) {
+		this.connexion.sendPacket(new CreateRoomPacket(roomName));
+	}
+
+	public void SendJoinRoom(String roomName) {
+		this.connexion.sendPacket(new JoinRoomPacket(roomName));
+	}
+
+	public void SendLeaveRoom() {
+		this.connexion.sendPacket(new LeaveRoomPacket());
+	}
+
+	public void RequestRoomList() {
+		this.connexion.sendPacket(new RequestRoomListPacket());
+	}
+
+	public void RequestActualRoom() {
+		this.connexion.sendPacket(new RequestActualRoomPacket());
+	}
+}