EDX-378: Fix typo
Merge pull request #122 from yokose-ks/EDX-378

EDX-378: Fix typo
EDX-378: Add shell for cron job
EDX-191: Fix typo
Merge pull request #123 from yokose-ks/EDX-378

EDX-378: Add shell for cron job
Merge pull request #124 from yokose-ks/EDX-191

EDX-191: Fix typo
EDX-446: Fix survey items of csv file

Fix a bug for the case that one survey has different survey items
from others in a course.