Portland’s Good Theater poetic, poignant revival of the Ahrens/Flaherty musical, A MAN OF NO IMPORTANCE, exquisitely directed by Brian P. Allen, marks several memorable milestones for this company which has been a jewel in Portland’s theatrical scene for twenty-one seasons. Not only does the production mark the 100th show that Allen has directed at the Good, which he co-founded with Steve Underwood in 2002, but sadly, it is also the last one they will mount in the Hill Arts Center (formerly the St. Lawrence Arts Center) on Munjoy Hill.