Changes since DRUPAL-6--2-2:
- feature #966658 by marvil07 | greggles: Prevent multiple votes in the same direction by the same user.
- Two more variables to specify vote link statuses on templates.
- Change all widgets accordingly.
- Prevent voting on ajax callback.
- bug #983452 by marvil07 | foredoc: Fixed 0 votes displayed on comment, even if comment voting is disabled.
- feature #791082 by realityloop, marvil07 | donquixote, Fidelix: Let separate voting widget from $comment->comment.