Renames site-wide.scss to site-wide.sass

It's actually SASS, not SCSS, which confuses the tools.
Applies .css-only changes to .sass file; regenerate .css

Since we have the SASS, we ought to update that and then compile
the CSS from that. A couple recent commits didn't do that; this
patch applies them in the SASS. I regenerated the CSS file with
those changes.
Merge pull request #90 from n1zyy/sassfix

SASS fixes