Fix cache ignore array.
Add ‘attention’ mixin.
Update generic box-sizing partial (inheriting box-sizing is probably a slightly better best-practice).
Update mobile detect script to latest version (v.2.8.3).
Combine desktop and tabled html heads, and delete obsolete tablet html head.
Don't check for tablet device class anymore with Mobile_Detect script; out-comment (for now) all isTablet checks and logic.