[Bugfix] 解决i18n不能在下载页面被下载到
[Doc] createSingle接口注释错误
[TestCase] getStyle中宽高设置在firefox中需要有默认宽高
Merge branch 'dev' of https://github.com/BaiduFE/Tangram2 into dev
[TestCase] 增加off解绑window用例
Merge pull request #545 from linlingyu/dev

Dev