Merge pull request #71 from heyongjian/master

huangming:merge the main branch to native branch.
fix bug: issue-10, the position that cling point to all apps buton is offset.

modify the cling offset values.
Merge pull request #134 from lwanghaol/master

wanghao:fix bug issue-30,crash when you drag the icon on the desktop
Merge pull request #137 from whuthm/master

fix bug: issue-10, the position that cling point to all apps buton is offset.
Merge pull request #47 from heyongjian/master

merge pull request