Added project 2
Added project 2


Former-commit-id: 96a52df00247b19cba4028cd3043e6c564ccab6d
Former-commit-id: a85e10012274a08743e04892f74ea21e51050f16
Former-commit-id: 6a5e8b1a4af27d4eff5f3eaf10df812725fccbf3
StanfordHCI/cs247,StanfordHCI/cs247,StanfordHCI/cs247