Merge branch 'feat/profilePage' into dev
add SignUpViewController
Merge branch 'dev' of https://github.com/Xinchi/CU-App into dev
add signup method
ADD QRENCODER
add datamodel
Merge branch 'dev' into feat/profilePage

Conflicts:
	Chinese Union.xcodeproj/project.pbxproj
	Chinese Union/SignUpViewController.h
	Chinese Union/SignUpViewController.m
	Chinese Union/SignUpViewController.xib