Public Enemy slipped a new album onto iTunes this weekend. Chuck D, Flavor Flav and the rest of the iconic hip-hop group released “Most of My Heroes Still Don’t Appear on No Stamp” via the online music store on Friday. The record marks Public Enemy’s first studio effort since 2007’s “How You Sell Soul to a Soulless People Who Sold Their Soul?” It’s also meant to be paired with their upcoming release of “The Evil Empire of Everything.” Chuck D explains that the two albums are twins, but clarifies that they’re fraternal rather than identical. “The Evil Empire of Everything” is scheduled to hit the market in September. HERE is the old school video….