I wrote an Automator workflow and bash script to download the source code and unpack it all. If you're interested, you can find more info about it here:
http://owensd.io/2015/01/12/keepi...p-to-date-with-handmade-hero.html, or you can go straight to the source here:
https://github.com/owensd/handmade/tree/master/ref.
This only works for the Mac as I didn't spend the time to figure out the redirect headers that Sendowl and AWS needs, so I have a workflow handle the downloading of the zip files.
Also note, you'll need to create a url.secret file, as mentioned in the blog post, to put the link you received in your signup mail.