Happy Halloween ghosts and ghouls! There’s a slew of great bands playing in Houston this week before heading up to a certain festival this weekend (hint: ____ ). We’ve got mega-celebs that have their own fragrances wrecking the Toyota Center in English AND Espanol on Wed., we’ve got huge indie bands Spoon and the New Pornographers teaching class on Thurs, and we have the Houstonist pick o’ the week: M.I.A. and Paul Wall on......