SERIES REPEAT: Friends, Romans, countrypeople, lend me your ears: One of TV’s most hidden gems, and most sparkling, is this Canadian comedy-drama series about a struggling Shakespearean acting troupe. And beginning today, the Acorn TV streaming service is repeating it in its entirety. Season 1, which launched in 2003, is showcased tonight, with the episodes of Season 2 following on November 25, and Season 3 after that in mid-December.Slings & Arrows stars Paul Gross, star of anoth