V. Collaboration, E. Aliu, S. Archambault, T. Arlen, T. Aune, M. Beilicke, W. Benbow, R. Bird, M. Boettcher, A. Bouvier and 75 other author(s). (2013)cite arxiv:1307.6772Comment: 9 pages, 7 figures. This is an author-created, un-copyedited version of an article accepted for publication in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it.