cleanup in prepare_data
cleanup in prepare_data

paulirish/caltrainschedule.io,paulirish/caltrainschedule.io,ranmocy/rCaltrain,ranmocy/rCaltrain,ranmocy/rCaltrain,ranmocy/rCaltrain,ranmocy/rCaltrain,paulirish/caltrainschedule.io,ranmocy/rCaltrain