Merge branch 'develop' into wk_bugs
项目签名设置
Merge branch 'develop' into suzhi

Conflicts:
	esapsign/DataManager/Client_target.m
	esapsign/commonPrefix.pch
通过指定系统文件夹的创建时间来实现固定顺序／对refFile的增强处理

首先在清理本地缓存时，同样清理file对象；其次在coredata里面对refFile关系的删除做了Deny设置。
Merge branch 'suzhi' into develop
Merge branch 'develop' into suzhi
调整一下首页UI
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
AppStore milestone 1
Merge branch 'develop'