Merge pull request #62 from heyongjian/master

merge pull request
Merge pull request #63 from heyongjian/master

merge pull request
fix bug:issue-55,download an application is too slow in joyfolder
fix bug:issue-56,when updating data, backup data, the application icon disappears
fix bug:issue-57, backup and re-packaged, when clicking the virtual box software, download no response.
Merge pull request #212 from lwanghaol/master

fix bug:issue-57, backup and re-packaged, when clicking the virtual box software, download no response