add radicals and strokes to CJK block
correction to em dash and ellipsis idvl. and liga.
add Chinese typefaces config before fallback
add customised emphasis mark

Strictly implemented according to:
http://www.w3.org/TR/css-text-decor-3/#text-emphasis-property
add api for `han-text-emphasis`
add config for justified alignment in articles
rename variables
update han.css
add config ‘punctuation skip’ for text-emphasis
adjustments on Romanisation falling and checked tones (ruby)
fix variable bug
fix wrap (Farr) issue on IE
null font name makes IE corrupt from rendering
activate ligature feature onto root element
singular form for consistency
sass @function `hyu-mark-to-code`
Biaodian Basic for Firefox
minor adjustments on web fonts
improvement for multiple weight fonts on `strong`, etc

- `strong`, `dfn` and `b`
- based on: https://github.com/necolas/normalize.css/pull/342
update han.css