Implement units test system, and use it
"Values and Units": Update units
Introduce data types variables, and use those
Update touch-action
Update "Scroll Snap Points Level 1"
Update geometryBox for "Masking Level 1"

via https://dvcs.w3.org/hg/FXTF/rev/41905cf28b8d

* fill & stroke properties should use old geometryBox
Add "Web Animations 1.0"
Update Transitions

* Add timingFunction data type, and use it
Update Animations
Fix 2 argument names