Merge pull request #19 from heyongjian/master

huangming:merge the main branch to native branch.
Merge pull request #20 from heyongjian/master

huangming:merge the main branch to native branch.
Merge pull request #21 from heyongjian/master

huangming:merge the main branch to native branch.
Merge pull request #22 from heyongjian/master

huangming:merge the main branch to native branch.
huangming:add the desktop appearance , replacing system icons and adaptation for new joy launcher.
Merge pull request #26 from whuthm/master

huangming:add the desktop appearance , replacing system icons and adaptation for new joy launcher.