add import in sui.js
update filesize.js
update sidenav
add filesize.jade
update filesizejs
update docs
Merge pull request #22 from sdc-alibaba/dialog

Dialog 对话框添加height参数,对应样式调整，更新文档
Merge pull request #23 from sdc-alibaba/filesize

$.filesize 一个超轻量的工具，将byte级别的正数（通常表征filesize）转成对人阅读更友好的格式。
change that to self
add cancelHide and cancelHidden event
update js and doc
添加用例，完善文档说明