Improve my github hack!

I just wrote a simple (and probably dirty) hack for making it a tiny
bit easier to vendor libs found on github.

(Or if you prefer to read it through my blaag:

I’m hoping folks will help me see what I’m missing or what I could do
better by forking the gist and improving the script.
Of course, if you know of a tool that already does this, just point me
there :slight_smile: