The HETDEX instrumentation: Hobby-Eberly Telescope wide field upgrade and VIRUS by Hill, GJ, Lee, H, MacQueen, PJ, Kelz, A, Drory, N, Vattiat, BL, Good, JM, Ramsey, J, Kriel, H, Peterson, T, DePoy, DL, Gebhardt, K, Marshall, JL, Tuttle, SE, Bauer, SM, Chonis, TS, Fabricius, MH, Froning, C, Haueser, M, Indahl, BL, Jahn, T, Landriau, M, Leck, R, Montesano, F, Prochaska, T, Snigula, JM, Zeimann, GR, Bryant, R, Damm, G, Fowler, JR, Janowiecki, S, Martin, J, Mrozinski, E, Odewahn, S, Rostopchin, S, Shetrone, M, Spencer, R, Mentuch Cooper, E, Armandroff, T, Bender, R, Dalton, G, Hopp, U, Komatsu, E, Lambert, D, Nocklas, H, Ramsey, LW, Roth, MM, Schneider, DP, Sneden, C, Steinmetz, M