Merge pull request #8 from sdc-alibaba/datepicker

add way to fix inline timepicker'bug
Merge remote-tracking branch 'origin/dev' into dropdown
rm console.log
fix dropdown bug
refactor checkbox
refactor checkbox
add different trigger to dropdown
Merge branch 'dev' into dropdown
Merge remote-tracking branch 'origin/dropdown' into dropdown
update dropdown docs trigger type
rm used id in dropdown docs
update docs
Merge pull request #10 from sdc-alibaba/dropdown

Dropdown 扩充触发方式，click 和 hover
Merge branch 'dev' of https://github.com/sdc-alibaba/sui into dev
fix a bug in dropdown docs
Merge branch 'dev' of https://github.com/sdc-alibaba/sui into dev
modify assist area method from click to hover