Address feedback from F2F <http://lists.w3.org/Archives/Public/www-style/2011Mar/0307.html>:

  - Remove 'unrestricted' value of 'text-wrap'
  - Mark 'all' value of 'hyphens' at-risk
  - Mark all other hyphenation properties at-risk
  - Make control characters invisible
  - Rename 'white-space-collapsing' to 'bikeshedding'
  - Remove 'keep-words' value of 'word-break'
  - Remove second <string> value of 'hyphenate-character'
  - Merge various hyphenation limits into one property
  - Allow zero tab-size
  - Add 'hyphenate' value to 'word-wrap'
  - Change 'no-' values of text decoration to 'cancel-'
  - Allow combination of 'cancel-' values with other values
  - Rename 'wave' to 'wavy' for text-decoration-style
  - Remove 'all' value of 'text-decoration-skip'
  - s/Draw/Display/ for text-emphasis
  - Note that CSS may in the future define controls to handle ruby/emphasis conflicts
  - Mark a bunch of properties optional for conformance due to their localized non-critical impact
  - Make a table indicating cultural target audience of various features
  - Start an explicit list of scripts for script categories

Additional editorial:
  - Rename Script Groups to Script Categorizations
  - Clarify some hyphenation/line-breaking interactions.
  - Rename full-size-kana to fullsize-kana to be consistent with fullwidth

Author: fantasai