By Julee Wilson http://m.huffpost.com/us/entry/3880363?ncid=txtlnkushpmg00000038 The moment has arrived — Bethann Hardison has finally launched her attack against fashion’s glaring diversity problem. The fashion insider-cum-activist and former model, on behalf of The Diversity Coalition, sent out four letters on Thursday to the governing bodies of Fashion Weeks in New York (Council of Fashion Designers of America),…