Merge pull request #183 from lwanghaol/ios-style

wanghao:fix bug issue-45,add the default file type
Merge pull request #87 from heyongjian/ios-style

Ios style
fix bug issue-46, when show the online wallpaper , need a long time to load wallpaper.

restory the online wallpaper list json to the sd card.
Merge pull request #187 from whuthm/ios-style

fix bug issue-46, when show the online wallpaper , need a long time to load wallpaper.
Merge pull request #191 from lwanghaol/ios-style

fix bug,issue-48,after the download is complete, the progress bar does not disappear
Merge pull request #59 from heyongjian/ios-style

pull request