widget中不需要自己移除ms-widget attribute节点了
为draggable增加一种配置方式：ms-draggable="$,$dragOpts"
Merge branch 'master' of https://github.com/RubyLouvre/avalon

Conflicts:
	avalon.autocomplete.js
Merge pull request #169 from tubo70/master

为draggable增加一种配置方式