修复tree组件从已有html生成时点击展开/收起按钮不生效的bug。 fixes #687
Merge branch 'master' of git://github.com/kissyteam/kissy into issue_687
修复tree组件从已有html生成时点击展开/收起按钮不生效的bug（测试通过）。 fixes #687
Merge pull request #689 from weekeight/issue_687

Issue 687