`gp.fileupload` is a set of wsgi middleware to deal with large file upload.

- `gp.fileupload.FileUpload` is a wsgi middleware to get the stat of large
  files uploaded to the server. Optional javascript code is provided to animate
  a progress bar.

- `gp.fileupload.Storage` is a wsgi middleware to store files on file system
  and avoid big transaction in your application.

