Department of Statistics, University of Oxford, 1 South Parks Road, Oxford, OX1 3TG, UK. herman@stats.ox.ac.uk.|Department of Statistics, University of Oxford, 1 South Parks Road, Oxford, OX1 3TG, UK. novak@stats.ox.ac.uk.|Department of Statistics, University of Oxford, 1 South Parks Road, Oxford, OX1 3TG, UK. rune@lyngsoe.eu.|Institute of Computer Science and Control, Hungarian Academy of Sciences, Lagymanyosi u. 11., Budapest, 1111, Hungary. adrienn.szabo@sztaki.mta.hu.|Institute of Computer Science and Control, Hungarian Academy of Sciences, Lagymanyosi u. 11., Budapest, 1111, Hungary. miklosi@renyi.hu.|Department of Statistics, University of Oxford, 1 South Parks Road, Oxford, OX1 3TG, UK. hein@stats.ox.ac.uk.