Forget the whole Marshall/Slim Shady/Eminem trichotomy, the real identity crisis going on in hip-hop is in the churning thoughts of Oliver Hart, alias Eyedea. He’s a self-hating braggart, an introspective extrovert, a seriously poetic battle rapper, a new-jack producer, at home alone with a pad as he is onstage on HBO. After slaying his competitors on [cont.]