TextLine的textarea增加禁止换行的设置

TextLine的textarea增加禁止换行的设置
Merge branch '3.1.0-dev' of https://github.com/ecomfe/esui into 3.1.0-dev
fixed issue #230

fixed issue #230
fixed issue #227

fixed issue #227  RangeCalendar 的快速选择显示
Merge pull request #241 from osdream/3.1.0-dev

fix issue #238 and #239
添加custom element支持

Merge #237
修复Select通过HTML设定selectedIndex属性无效的问题

Fixed #244
修复activeIndex从HTML中定义时无效的问题

Fixed #243
修复一堆jshint错误
修复Tree的indicateNodeLoading的实现错误
Merge branch '3.1.0-dev' of github.com:ecomfe/esui into 3.1.0-dev
优化从DOM元素中获取value属性的逻辑

仅针对`<select>`元素去除`value`值的判断逻辑，对于`<textarea>`和`<input>`元素，依旧以`value`值为准

Fixed #244
统一input和hint的vertical-align属性

fixed issue #113
Merge branch '3.1.0-dev' of https://github.com/ecomfe/esui into 3.1.0-dev
fixed issue #154

fixed issue #154
删除无用图标和目录

fix issue #218
修复Chrome下渐变背景异常的问题

fix issue #216
Fix typo

这个直接改了应该没问题吧，不发 PR 了
简化Layer.attachTo的实现

Fixed #233
增加Dialog底部button的class属性

增加Dialog底部button的class属性