Theater review TITANIQUE 1 hour and 40 minutes, with no intermission. At the St. James Theatre, 246 W. 44th St. The strange and scrappy voyage of “Titanique,” the feel-great musical-comedy sendup of the movie “Titanic” and singer Celine Dion, has been a wonder to behold. And pretty hard to believe. If the RMS Titanic was the largest vessel of its time and thought to be unsinkable, “Titanique,” which opened on Broadway Sunday night, started out as a wooden rowboat with a single paddle. Its first