Added notebooks with example computation, method for presentation of tautological ring (Holmes), permutation action on markings (Hippold), spin cycles of strata of differentials (Wong), code for identifying classes via intersection numbers/boundary restrictions (Wong), an online database of tautological relations (Hippold, Schwab, Wennink, Delecroix), Witten's r-spin class (Janda, Pixton, Schmitt), nicer printing of stable graphs and tautological classes (Chapoton, Schmitt) and socle evaluations for smaller moduli (Pixton, Schmitt)