Added .idea file to gitignore to ignore PyCharm files
Added .idea file to gitignore to ignore PyCharm files

NYU-DevOps-Fall2017-PromotionsTeam/promotions,NYU-DevOps-Fall2017-PromotionsTeam/promotions,NYU-DevOps-Fall2017-PromotionsTeam/promotions,NYU-DevOps-Fall2017-PromotionsTeam/promotions