Thirty directors from all over Europe converged on Greece for a showcase of its fizzing new talent that even included a play about the Nazis by Tony Kushner. What did they learn on this five-day odyssey? How do we cope with the loss of a loved one? Do the rituals of mourning help? And is there any prospect of an afterlife? These questions were buzzing in my brain after seeing a wordless 70-minute show, Goodbye, Lin…