Institute of Neuroinformatics, University of Zürich/Swiss Federal Institute of Technology Zürich, Switzerland. fred@ini.phys.ethz.ch|Institute of Neuroinformatics, University of Zürich/Swiss Federal Institute of Technology Zürich, Switzerland. fred@ini.phys.ethz.ch|Institute of Neuroinformatics, University of Zürich/Swiss Federal Institute of Technology Zürich, Switzerland. fred@ini.phys.ethz.ch|Institute of Neuroinformatics, University of Zürich/Swiss Federal Institute of Technology Zürich, Switzerland. fred@ini.phys.ethz.ch|Institute of Neuroinformatics, University of Zürich/Swiss Federal Institute of Technology Zürich, Switzerland. fred@ini.phys.ethz.ch|Institute of Neuroinformatics, University of Zürich/Swiss Federal Institute of Technology Zürich, Switzerland. fred@ini.phys.ethz.ch|Institute of Neuroinformatics, University of Zürich/Swiss Federal Institute of Technology Zürich, Switzerland. fred@ini.phys.ethz.ch