Normalize imports. (#628)

iap/iap.go

migrate/migrate.go

server/api_account.go

server/api_authenticate.go

server/api_channel.go

server/api_event.go

server/api_friend.go

server/api_group.go

server/api_leaderboard.go

server/api_link.go

server/api_match.go

server/api_purchase.go

server/api_session.go

server/api_storage.go

server/api_tournament.go

server/api_unlink.go

server/api_user.go

server/console.go

server/console_account.go

server/console_api_explorer.go