Merge pull request #76 from heyongjian/master

huangming:merge the main branch to native branch.
fix bug: issue-21, when launcher data clear, wallpapers do not show.

restory the native wallpaper json to sd, and modify the push remind
layout.
Merge pull request #148 from whuthm/master

fix bug: issue-21, when launcher data clear, wallpapers do not show.