M. Vogelsberger, S. Genel, D. Sijacki, P. Torrey, V. Springel, L. Hernquist, and ). (2013)cite arxiv:1305.2913Comment: 38 pages, 16 figures, submitted to MNRAS. Volume-rendering movies and high-resolution images can be found at http://www.cfa.harvard.edu/itc/research/arepogal/.