`hyphens`

- https://developer.mozilla.org/en-US/docs/Web/CSS/hyphens
- http://caniuse.com/css-hyphens
- http://dev.w3.org/csswg/css-text/#hyphens
- https://github.com/chriseppstein/compass/blob/stable/frameworks/compass/stylesheets/compass/css3/_hyphenation.scss