cs215/finalexam/08_finding_a_favor_my.py: minor code cleanup
cs215/finalexam/08_finding_a_favor_my.py: implemented it successfully; now just need to pick the right Dijkstra's
cs215/finalexam/08_finding_a_favor_my.py: added a bunch of tests; more needed
cs215/finalexam/08_finding_a_favor_my.py: done!