bugfix for error line 131, file not found on some versions of windows

I came across this recording a video for a windows 7 install. I think on other platforms File.open w/w+ works as intended, but on Windows Ruby it fails because of the missing scss directory. There are about 10 posts / issues about this across gh, so, forum, etc.

VirtualBox: Windows 7 Pro 64
Ruby 1.9.3
Node 0.10.28
npm 1.4.9
git 1.9.2.mysygit.0