Remote SSH upload of archives

[Knetic]

With #20 and #21 it's possible to fetch HTTP archives and store locally. While nice, this is a one-way street. It would be good if users were able to upload their archives to remote sources as well.

An SSH upload flag ought to be implemented, which allows users to specify -u followed by an SSH url (user:pass@host:/path/to/thing). wisk should then attempt to transfer the file via SSH to the given path.