Remove unnecessary import module
Remove unnecessary import module
Catch up yesod-platform-1.2

migrate Handler/Project.hs only
Catch up yesod-platform-1.2

migrate Handler/Participants.hs only
Catch up yesod-platform-1.2

migrate Handler/User.hs only
Catch up yesod-platform-1.2

migrate Handler/S3.hs only