Significant cleanup and improvements

api/album_get.go

api/album_list.go

api/albumimage_get.go

api/albumimage_list.go

api/image_get.go

api/image_list.go

api/image_upload.go

auth/parse_user.go

cmd/backend/main.go

cmd/frontend/main.go

configuration/auth.go

configuration/backend.go

configuration/configuration.go

configuration/conversion.go

configuration/database.go

configuration/frontend.go

configuration/queue.go

configuration/redis.go

configuration/storage.go

environment/backend.go