OT, I am not familiar with GitHub and I know it's much more than a download site. As a Download site, however, I don't think it's very user friendly. You think you've have what you want when you see the file icon but that isn't clickable. 'Raw' doesn't sound very good and neither does 'History' Then 'Downloads' link looks like a link to a more general page than the Download link for this file in particular. Through trial and error I found what I was looking for after not too long but it left me feeling a little stupid and irritated at the same time.

Edit: it reminded me of this http://okcancel.com/comic/4.html