fix bug issue-58, the wallpaper recommend bar does not have progressbar when load the data.

add the progressbar.
Merge pull request #212 from lwanghaol/master

fix bug:issue-57, backup and re-packaged, when clicking the virtual box software, download no response
Merge pull request #214 from whuthm/master

fix bug issue-58, the wallpaper recommend bar does not have progressbar when load the data.
Merge pull request #65 from heyongjian/master

pull request