adding links to examples on A02
adding links to examples on A02


Former-commit-id: 48a24b73f9240c54335af65ff09805a893dd6efd [formerly 0f2a05dd1cbf3aee6ce529e7fc58e1eb8de0d109] [formerly 9254cc95c703cfa7b920c5b261511e0817fe2493]
Former-commit-id: e2a3f38118db2a42929e715b5f8bf3d6937713a8
Former-commit-id: 07dbb287f2d1d009975c0c439ba404da9bd18677
StanfordHCI/cs247,StanfordHCI/cs247,StanfordHCI/cs247