Status of the CLIC phase and amplitude stabilisation concept by Schulte, D, Andersson, A, Bettoni, S, Corsini, R, Dubrowskiy, A, Gerbershagen, A, Jeanneret, J, Morpurgo, G, Sterbini, G, Stulle, F, Tomas, R, Marcellini, F, Burrows, P, Perry, C, Aksoy, A, Arsov, V, Dehler, M