Stephen Sondheim says it’s a “breakthrough” — a new way of telling musical stories.President Barack Obama loved it.I loved it.You will too.It is the hottest ticket on Broadway and should be a shoo-in for this year’s Tony Award for Best Musical.It has but one word in its title and my critique can describe it in similar terms: Brilliant! Marvelous! Unique! Innovative!It is “Hamilton,” the new hip-hop sensational musical about our Founding Fathers which has garnered much praise and …