‘It’s me.’ Delivered amid a melee of frazzled movement and chanting, these are the only two words spoken in the first ten minutes of Enda Walsh’s The Walworth Farce.  As the script is built upon a play within a play in which the Gleeson men cover nine roles, this clever opening could not be more smug for a show that lives in a universe of rapidly changing identities. Set in the dingy London flat of Corkian patriarch Dinny (Brendan) and sons Blake (Domhnall) and Sean (Brian), the show begins as the neurotic trio hastily set the stage of their decrepit…