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.