(AKA 'likes', '+1', etc)
The upvote features are powered by ActsAsVotable.
The gem also offers downvotes; ShinyCMS has separate settings to turn on just the upvote feature, or both upvotes and downvotes.
( TODO: should be a feature flag to turn on/off the whole voteable feature-set, and then a setting for 'allow_downvotes' )
This feature will probably be moved into a plugin at some point.