J. Kormendy, and L. Ho. (2013)cite arxiv:1304.7762Comment: 136 pages, 38 postscript figures, 4 tables; requires cittable.tex, psfig.tex, annrev4K-E.tex; accepted for publication in Volume 51 (2013) of Annual Review of Astronomy and Astrophysics; Supplementary Information will be submitted to arXiv separately in approximately 2013 June.