Merge pull request #64 from heyongjian/ios-style

Ios style
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 #213 from lwanghaol/ios-style

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