Default grades to zero and show them

Merge pull request #29 from ExtensionEngine/vkaracic/fix

NDPD-1213: Default grades to zero and show them

Show max score in grading modal.

Merge pull request #28 from ExtensionEngine/vkaracic/NDPD-1243

NDPD-1243: Show max score in grading modal.

Rename `Change grade` to `Enter grade`

Merge pull request #27 from ExtensionEngine/vkaracic/NDPD-1121

NDPD-1121: Rename `Change grade` to `Enter grade`.

Localize submission datetimes

Merge pull request #26 from ExtensionEngine/mjevtic/NDPD-1293

[NDPD-1293] Show answered_at in the local datetime in the downloaded grade report

Set same message for when due date has passed or grades have been published.

Merge pull request #25 from ExtensionEngine/vkaracic/NDPD-1251

Set same message for when due date has passed or grades have been published.

Add checks for when grades have been published

Merge pull request #22 from ExtensionEngine/vkaracic/NDPD-1251

NDPD-1251: Add checks for when grades have been published.

Update previous CSMs on weight update

Merge pull request #21 from ExtensionEngine/vkaracic/NDPD-1235

NDPD-1235: Update previous CSMs on weight update.

Removed translations from display_name field

Jkotarac/ndpd 1216 (#20)

* Removed translations from display_name field

* Bumped version

* Addressed comments

Width parameter added

Merge pull request #19 from ExtensionEngine/vkaracic/NDPD-1214

NDPD-1214: Add ability to set size of answer textarea.

Save submission datetime in the UTC format

v0.2.15

[NDPD-1170] Save submission datetime in UTC timezone