checkbox and radio.
Merge branch '3.1.0-dev' of https://github.com/ecomfe/esui into 3.1.0-dev
修改demo里引用的第三方库的地址
修改BoxGroup中自定义外观变量的名称
对checked对应的repaint增加如下处理：
当indeterminsate为true的时候设置input的checked值为false
fixed group class issue.
Merge branch '3.1.0-dev' of https://github.com/ecomfe/esui into 3.1.0-dev

Conflicts:
	demo/assets/demo.css
	demo/classic/Button.html
	src/css/standard/main.less
fixed demo style.
修改BoxGroup、CheckBox控件定义样式的方式：不再使用data-ui-custom-look属性，而直接添加在元素class属性上；
把indeterminate和rawValue、checked合成了一个paint
add textbox less.
修改把indeterminate和rawValue、checked合成了一个paint引起的bug
checkbox增加switch
switch style.
Merge branch '3.1.0-dev' of https://github.com/yankun01/esui into 3.1.0-dev

Conflicts:
	demo/standard/BoxControl.html
	src/css/standard/Checkbox.less
加入fontawesome图标
Merge branch '3.1.0-dev' of https://github.com/yankun01/esui into 3.1.0-dev
删除fa-icons.less多余的class
修复CheckBox、BoxGroup的兼容性问题
Merge branch '3.1.0-dev' of https://github.com/ecomfe/esui into 3.1.0-dev

Conflicts:
	src/css/standard/main.less
Merge branch '3.1.0-dev' of https://github.com/yankun01/esui into 3.1.0-dev