prediction stuff moved out of the Rating model and into the Prediction
model
home controller specs pass, had to get rid of absolute value calculation since .includes does not work with .select and .joins does not do eager-loading
I hate logic in views but I think in this case it's not too bad
Fix cucumber tests that now need a prediction created rather than just a rating. Removed one test that essentially just tested pagination, modifying an association two levels deep probably not worth it. Sort by predictions.value rather than prediction for /rated|unrated/page/:page
removed mostly useless feature