vi
Modify menu (accordion --> panel-accordion)
Modify intro page,
complete drag and drop , resize
possible drag text
drag and drop
create db, possible signup
Possible new button, modal dialog
using flask-login, modify login session
possible login logout session
confirm login , logout, session, redirect subject
init
heroku db, dbenviron configuration
db.createall()
configure db_url
delete db_createall()