plt/racket — pull request #197 by simmone (2012-12-13 08:44:00+00:00)
Title: Add ftp upload, progress monitor and other basic ftp client operation.

Add ftp-upload-file, ftp-delete-file, ftp-make-directory, ftp-delete-directory, ftp-rename-file.

Add progress monitor func to ftp-download-file and ftp-upload-file, let client can display progress
on gui.

Add tests and document.