Lorraine Hansberry is best known as the author of the acclaimed and prize-winning “A Raisin in the Sun,” a play which brilliantly depicts African-American family life in this country during the 1950s.Hansberry died of cancer at the age of 34 in 1965. Her ex-husband would go on to compile her unpublished writings and turn them into an autobiographical play, “To Be Young, Gifted and Black.” They’re accurate words to describe her.Before Hansberry’s death, she wrote a few other plays …