Change ExecutableCommand interface (wip – doesn't compile)

- Change interface to use (CommandSender, List<String> arguments)
- Use CommandArgumentDescription#name instead of "label" (to prevent confusion between command labels and arguments)
- Simplify command difference computation in CommandHandler (no longer consider argument difference)

src/main/java/fr/xephi/authme/command/executable/logout/LogoutCommand.java

@@ -1,21 +1,22 @@
 package fr.xephi.authme.command.executable.logout;
 
 import fr.xephi.authme.AuthMe;
-import fr.xephi.authme.command.CommandParts;
 import fr.xephi.authme.command.ExecutableCommand;
 import fr.xephi.authme.util.Wrapper;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 
+import java.util.List;
+
 /**
  */
 public class LogoutCommand extends ExecutableCommand {
 
     @Override
-    public boolean executeCommand(CommandSender sender, CommandParts commandReference, CommandParts commandArguments) {
+    public void executeCommand(CommandSender sender, List<String> arguments) {
         // Make sure the current command executor is a player
         if (!(sender instanceof Player)) {
-            return true;
+            return;
         }
 
         // Get the player instance
@@ -24,6 +25,5 @@ public class LogoutCommand extends ExecutableCommand {
 
         // Logout the player
         plugin.getManagement().performLogout(player);
-        return true;
     }
 }