Point Decay Module Expansion

[purduekenny]

When a user hits the points that sets the Helpful role, they can automatically decay out of the role based on the 24-hour timer that is set. In order to avoid this, we want separate triggers for role assignment and unassignment.

Role Assignment: 20 points
Role Unassignment: 16 points

This allows at least 3 days for the user to maintain their role before being demoted.