Radio Galaxy Zoo: host galaxies and radio morphologies derived from visual inspection by Banfield, J, Wong, O, Willett, K, Norris, R, Rudnick, L, Shabala, S, Simmons, B, Snyder, C, Garon, A, Seymour, N, Middelberg, E, Andernach, H, Lintott, C, Jacob, K, Kapińska, A, Mao, M, Masters, K, Jarvis, M, Schawinski, K, Paget, E, Simpson, R, Klöckner, H, Bamford, S, Burchell, T, Chow, K, Cotter, G, Fortson, L, Heywood, I, Jones, T, Kaviraj, S, López-Sánchez, Á, Maksym, W, Polsterer, K, Borden, K, Hollow, R, Whyte, L