Weblink page is broken

[senakoko]

The weblink (http://swcarpentry.github.io/shell-extras/03-file-transfer.html) provided as an argument to the transferring file commands (wget, curl and lftp) is broken.

It generates the ERROR 404: File not found

[gdevenyi]

Looks like jekyll upgrade probably changed this.

Should be
https://swcarpentry.github.io/shell-extras/03-file-transfer/index.html

PR welcome.

[colinsauze]

I think I have fixed this (and changed it to carpentries-incubator.github.io) in pr #73