Add score column to Production
Remove #score from Production
Add update_score rake task for all productions
Add default value of 0 to production score
Add #update_score to Production
Update Production rake task with new #update_score
Update production rating when review added/changed
Refactor Production sorting
Add Production score update on review destroy
Refactor production score display
Move production display methods to helper module
Remove redundant order call
Refactor rating options to view helper
Fix review score update bug
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