Whee, it’s my birthday! Before I head off to see Superchunk, let’s pause a moment in appreciation of the author of “Happy Birthday.” (Not the Weird Al version, or the misbegotten knockoffs they trot out at Chili’s and the like. The normal one.) The Hill sisters got the royalties, but credit is due to a largely-forgotten scofflaw, Mr. Robert Coleman. Wherever you are, Mr. Coleman, I thank you. America thanks you. And the descendants of the Hills thank you, as they light their cigars with twenties. None