Merge pull request #7 from tianlili/dev

[testcase]更新用例
添加代码规范
优化规范
优化规范
优化规范
Merge pull request #8 from liaoxuezhi/dev

Dev
优化规范
优化规范
Merge pull request #9 from liaoxuezhi/dev

Dev
优化规范
优化规范
优化规范
优化规范
优化规范
优化calendar, 解决picker destroy的时候不删除弹出框问题
Merge pull request #11 from liaoxuezhi/dev

优化规范
[testcase]补充calendar和calendar.picker的用例
[testcase]微调calendar.picker的用例