Merge pull request #27 from lwanghaol/master

wanghao:add iconlistprefrences,add menu for add widget
Merge pull request #23 from heyongjian/master

huangming:merge the main branch to native branch.
huangming:add the wallpaper cycle for new joy launcher.
Merge pull request #28 from whuthm/master

huangming: add the wallpaper cycle for new joy launcher.
Merge pull request #15 from heyongjian/master

Merge pull request #28 from heyongjian/master