Update "Flexible Box Layout Level 1"

* Add width, flexDirection, flexWrap, flexPosition, alignItems, justifyContent data types
Update Display

* Template's display-inside: Remove ruby
Update "Media Queries Level 4"

* Add ((query)), not (query), general enclosed, or
* Update range type
Update "Shadow DOM Styling"

via https://dvcs.w3.org/hg/csswg/rev/b931546ac844
Update "Values and Units"