Nigger! There, now I've said it. Apparently, political correctness, an inadequate grasp of history and a failure to maximize resources have taken the real ugliness from the word and turned it into verbal medallion that hangs in a shadow-box on a museum wall of the minutia of American Slavery. Thanks to Quentin Tarantino and Jamie Foxx, nigger is raising eyebrows, stuttering speech and making the…