HOLD: Feedback faves and flags

This is the PR for the feedback faves and flags.

See: https://github.com/GigaOM/gigaom/milestones/Comment%20redesign%20v3:%20faves%20and%20flags
this done function is long enough that it would seem justified to split it out into a named function.  Perhaps `bsocial_comments_moderation.event.feature`