Get rid of tp/fp/rude on the Comment table

[scohe001]

With the advent of the Feedbacks table, storing tp/fp/rude int's on the Comment is now redundant.

That being said, everything looking at tp/fp/rude numbers is looking at those columns, so this may be a bit of an undertaking.

What will likely need to be done:

• Remove tp/fp/rude int columns on the Comment table
• Add some easy way to fetch tp/fp/rude numbers for a column
  • Maybe a view? Or the SQLite equivalent? Or just a function on the Comment class that returns a map?
• Update all code fetching/updating those values to ensure that it's fetching/updating Feedbacks instead
• Write a migration script or SQLite query to create Feedback rows from anonymous users (maybe user id -1) for all of the legacy comments before this db table was added