Merge branch 'dev' of https://github.com/sdc-alibaba/sui into dev
完善复杂触发元素时复杂tip的逻辑。升级文档
更换处理tip里内容换行情况的方式
Merge pull request #14 from sdc-alibaba/tooltip

Tooltip 优化、升级、添加复杂触发元素支持
增加参数width，手工设置宽度，注意和widthlimit不同。
Merge branch 'dev' of https://github.com/sdc-alibaba/sui into dev
Merge branch 'dev' into tooltip