Add callback success to doLogin function
change logged in msg
Add user email to account area
Start implement new data structure of teachers and students
Change QR code
Change users resource to students
Changed weixin-api
Change users resource to students in public/index.html
Add back messages route in Firebase to index.html
Change assign teacher method as not to destroy other data
Changed qiniu multimedia upload
Fix syntax parenthesis error
Fix typos
Change users css tag to students
Add voice message handling except for the final step