Rename twistd plugin.
Remove commented debug print.
Remove unnecessary uses of ** with dict literals.
Merge branch 'develop' into feature/issue-2-initial-review-miscellany
Remove unnecessary TODO.
Add some unique_codes table indexes.
Merge branch 'develop' into feature/issue-2-initial-review-miscellany
Merge branch 'feature/issue-2-initial-review-miscellany' into develop