add api classAnimation

add api classAnimation
add preventdefault events

add preventDefault events for page/link/form~
data-preventdefault API doc update

data-preventdefault API doc update
data-preventdafault update

data-preventdafault update
test page disorder

test page disorder
test page wrong place

test page wrong place
fix a bug cause by data-preventdefault

fix a bug by data-preventdefault that may cause no out element;
Merge pull request #41 from zhangxinxu/develop

Develop