mecampbellsoup/chess-ladder — pull request #2 by scottluptowski (2013-11-13 20:51:02+00:00)
Title: Simple ELO

- All players have an ELO rating
- When a challenge is logged, the winner's ELO rating rises and the loser's falls
- Players who were created before the DB row existed have a default rating
- ELO rating is now on players#index

@mecampbellsoup looks ready for merge