sass'ing skeleton

Hi there, it's been a long while that I don't use css any more.
I tried with less and then with sass and never went back again.
Last week I've been making some research on css frameworks for kicking off a new project where I work.
And I found skeleton, that is not only what I was after, but also way better than many others.
The only downside for me, was it not being in sass.
But that wasn't a real issue, cause I could make that happen straight away.
So here it is my pull request. My sharing with the community.
Thx.

jgtoriginal.