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
At this time, I believe this is safe.  However, if something could inject nastiness into comment types, this global variable could be set badly as well.  It feels like this should be cleansed for future safety.