Merge tag 'v6.6.0' into develop

Foundation 6.6.0

Author: joeworkman

scss/settings/_settings.scss

@@ -100,6 +100,8 @@ $global-color-pick-contrast-tolerance: 0;
 $print-transparent-backgrounds: true;
 $print-hrefs: true;
 
+@include add-foundation-colors;
+
 // 2. Breakpoints
 // --------------