Remove trailing whitespace
Add pry debugger
Relate comments to a subscription. Remove old columns used for this from the comments model but make one of the columns removed an attr_accessor on the comment model. This is used to record the users preference so that we can know to create a subscription once they have signed in/up.
Comment followup document notifications are now done via a subscription - this updates the js ajax code (converting it to coffeescript) and updates the controller for this as well. We also update the user_data_persistor method for this to do the same.
Scope comment posting notifications only to agencies that participate in regulations.gov.
Update comment mailer as appropriate based on other changes to app.