Aliases are now unmodifiable.

src/main/java/net/pingex/dcf/commands/Command.java

@@ -242,7 +242,7 @@ public abstract class Command implements ICommandExecutor
 
 	public List<String> getAliases()
 	{
-		return aliases;
+		return Collections.unmodifiableList(aliases);
 	}
 
 	public String getDescription()