Merge pull request #89 from RubyLouvre/master

merge from RubyLouvre/onionui
dropdown fix 上下箭头选择时可以选择到disabled的选项；miniswitch 修正样式的属性名；index增加smartgrid的显示
修复avalon.dropdown.ex6的文档 dropdown修复ie下blur事件
Merge pull request #90 from RubyLouvre/master

merge from RubyLouvre/onionui
Merge branch 'master' of https://github.com/ilife5/avalon.oniui

merge
修正dropdown在ie下的定位问题
通过条件判断是否需要增加事件绑定
Merge pull request #288 from ilife5/master

dropdown fix 默认值的初始化及定位问题