By: Addison Wylie The Selfish Giant gives off an aroma of a film that will be remembered for a very long time.  The staying power of its troubled characters as well as the painfully realistic portrayal of a down-and-out community in Northern England are quite remarkable. This directorial feature debut from British director Clio Barnard trails the life of two young troublemakers trying to make sense of their early teens.  Both boys always yearn to…