Removed pupdb dependency

devel/example_devel/instructor/cache.db

devel/example_devel/instructor/cache.db-shm

devel/example_devel/instructor/cache.db-wal

...mple_devel/instructor/cs108/Report2_handin_25_of_30.token

devel/example_devel/instructor/cs108/cache.db

devel/example_devel/instructor/cs108/db.pkl

devel/example_devel/instructor/cs108/deploy.py

devel/example_devel/instructor/cs108/homework1.py

devel/example_devel/instructor/cs108/report_devel.py

devel/example_devel/instructor/cs108/report_devel_grade.py

...ctor/cs108/unitgrade_data/AnotherTest-test_even_more.json

...cs108/unitgrade_data/AnotherTest-test_even_more.json.lock

...nstructor/cs108/unitgrade_data/AnotherTest-test_more.json

...ctor/cs108/unitgrade_data/AnotherTest-test_more.json.lock

...ple_devel/instructor/cs108/unitgrade_data/AnotherTest.pkl

...vel/instructor/cs108/unitgrade_data/Numpy-setUpClass.json

...nstructor/cs108/unitgrade_data/Numpy-setUpClass.json.lock

...devel/instructor/cs108/unitgrade_data/Numpy-test_bad.json

.../instructor/cs108/unitgrade_data/Numpy-test_bad.json.lock

...l/instructor/cs108/unitgrade_data/Numpy-test_weights.json