add timing-function `steps()`
修改::selection的描述

增加text-shadow可以被::selection定义
修改描述

修改描述
修改vertical-align正文中的继承性

修改vertical-align正文中继承性的笔误：有->无
Merge pull request #22 from myst729/master

add timing-function `steps()`
js404
Merge branch 'master' into gh-pages
up vmax
table title
Merge branch 'gh-pages'

Conflicts:
	values/length/vmax.htm
remove
Merge branch 'master' into gh-pages

Conflicts:
	properties/animation/animation-timing-function.htm
	properties/text/vertical-align.htm
	properties/transition/transition-timing-function.htm
	test.htm
统一缩进