Patch 1

I've had problems getting this to work (even with restarting the server, which is always necessary), I think because the build process breaks if you try to include the root SCSS ('_bourbon.scss') before the other scss files it tries to import have been added.  This can possibly be avoided by starting up the server without any `@import` statements, stopping it, adding the `@import` back in and then restarting, but this way round that's not necessary.  Also bumped fourseven:scss to 1.0.0.