The K2 Mission: Characterization and Early results by Howell, S, Sobeck, C, Haas, M, Still, M, Barclay, T, Mullally, F, Troeltzsch, J, Aigrain, S, Bryson, S, Caldwell, D, Chaplin, W, Cochran, W, Huber, D, Marcy, G, Miglio, A, Najita, JR, Smith, M, Twicken, J, Fortney, J