fix msg
update steps
add input-inner
modify tag
Merge branch 'dev' of https://github.com/sdc-alibaba/sui into dev
modify tag,label text
add checkbox
modify steps height
update checkbox
fix bug in ie
Merge remote-tracking branch 'origin/dev' into checkbox
Merge pull request #2 from sdc-alibaba/steps

改变steps的高度
update docs layout
update docs layout in mobile
Merge branch 'dev' into checkbox
Merge remote-tracking branch 'sui/dev' into dev

Conflicts:
	docs/templates/forms.jade
	docs/templates/msgs.jade
	less/steps.less
	less/variables.less
fix check bug
update developer readme
no op when disabled
Merge pull request #1 from sdc-alibaba/checkbox

Checkbox