Added TestGetScore with first few methods. Deleted old print statements from earlier tests. Renamed fake_key to key in earlier tests.
Finished with TestFindAttempted, all tests pass.
Merge branch 'csvoss/refactor-grades' of github.com:edx/edx-platform into csvoss/refactor-grades
Merge branch 'csvoss/refactor-grades' of github.com:edx/edx-platform into csvoss/refactor-grades