Merge branch 'develop' into wk_bugs
add alert message in settings

在设置/用户下添加alert信息，并去掉设置/关于cell identifier
Merge branch 'wk_bugs' into develop
CoreData中target和file的引用关联设为no action，按create time排序
Merge branch 'suzhi' into develop
Merge branch 'develop' into suzhi
AppStore milestone 1
Merge branch 'develop' into suzhi