Sync
Add isolated-mobile.png, lay div.col.img
Optimize background mixin, remove div.col.img, add img, fix nav colors, rm colors.scss
Update ISSUES.md & modify nav text-inset blur
Change header font, fix header-h1-font-size bug, clean up .scss & .css files
Begin values port to options.scss, upgrade font properties to use font mixing, update ISSUES.md
Small base-font-size mixin fit