“Suicide Notes” is a beautifully moving, insightful exploration of the moments before suicide told through astounding statistics and the suicide letters of real people. It’s hard to be believe that a play about suicide could be inspiring, but thanks to the profoundly talented writer/director Stan Zimmerman and the magnificent cast (Olivia D’Abo, Allie Gonino, Peter Onorati, Brendan Robinson), it is a remarkable, uplifting evening in the theatre.