Department of Computer Science and Engineering, University of California San Diego, La Jolla, California, USA. gbhatia@mit.edu|Department of Computer Science and Engineering, University of California San Diego, La Jolla, California, USA. gbhatia@mit.edu|Department of Computer Science and Engineering, University of California San Diego, La Jolla, California, USA. gbhatia@mit.edu|Department of Computer Science and Engineering, University of California San Diego, La Jolla, California, USA. gbhatia@mit.edu|Department of Computer Science and Engineering, University of California San Diego, La Jolla, California, USA. gbhatia@mit.edu|Department of Computer Science and Engineering, University of California San Diego, La Jolla, California, USA. gbhatia@mit.edu|Department of Computer Science and Engineering, University of California San Diego, La Jolla, California, USA. gbhatia@mit.edu