You know what Kemah needs?We mean, beyond extensive repairs in the wake of Hurricane Ike.What Kemah (apparently) needs is a replica of the Nina, one of the three boats Christopher Columbus sailed to make his old-white-man invasion of the bucolic New World.There is a mysterious plan afoot to restore the Nina replica that sits now in Corpus Christi, forlorn and in need of maybe a million dollars' worth of repairs.At least it's in better shape than the Pinta and the Santa Maria, which were rammed b