1. TAPIR, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA
2. Center for Computational Astrophysics, Flatiron Institute, 162 Fifth Avenue, New York, NY 10010, USA
3. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
4. Department of Physics, Center for Astrophysics and Space Science, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
5. Department of Physics and Astronomy and CIERA, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
6. Institute for Computational Science, University of Zurich, Zurich CH-8057, Switzerland
7. Department of Astronomy and Theoretical Astrophysics Center, University of California, Berkeley, CA 94720-3411, USA
8. Canadian Institute for Theoretical Astrophysics, 60 St George Street, University of Toronto, Toronto ON M5S 3H8, Canada