Add correct_or_past_due option for showanswer and update relevant documentation
Add Martin Segado to authors file
Add support for theme translations and LANGUAGE_DICT override
Improvements to clicking and synchronization in Studio bok-choy tests.
Merge pull request #4209 from msegado/showanswer-correct-or-past-due

Add "Correct or Past Due" option for showanswer
Merge pull request #4533 from Stanford-Online/kluo/i18n-support-theme

Add support for theme translations and LANGUAGE_DICT override
Merge pull request #4465 from edx/zoldak/fix-studio-clicks

Improve clicking and synchronization in Studio bok-choy tests
BLD-1104: List units that use group configuration.
REVERT THIS COMMIT BEFORE MERGE.
Addressed some comments.
Fix errors tests.
Fix tests.
Get unit safely.
Update tests.