modify file download bugs
certificate
Merge branches 'master' and 'dongfengsun' of https://github.com/infoyou/QiXin into dongfengsun

Conflicts:
	QiXin.xcodeproj/project.pbxproj
stash
add coach feedback
add coach feedback
Merge remote-tracking branch 'origin/dongfengsun'

Conflicts:

Application/Project/Controller/BJControllers/Libary/BJLibaryCommentsView
Controller.m