New scoring rules for penalties

[jack89roberts]

Same points irrespective of position.

[jack89roberts]

My current thinking for a way to do this without having to overhaul the player model is to change the points scored per goal to frac_penalty_goals*penalty_goal_pts + (1-frac_penalty_goals)*position_goal_pts, where the fraction of penalty goals scored is a parameter we'd need to fit separately (with a time weighting) and would only be non-zero for penalty takers.

This is assuming we have stats on which goals scored were penalties, I haven't checked. If not that's the first thing we'd need.

[jack89roberts]

Looks like penalties scored is not in the FPL data, at least not in the UI... We could determine it via total points scored perhaps...