Institute of Neuroinformatics, Uni/ETH Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland. longair@ini.phys.ethz.ch|Institute of Neuroinformatics, Uni/ETH Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland. longair@ini.phys.ethz.ch|Institute of Neuroinformatics, Uni/ETH Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland. longair@ini.phys.ethz.ch