Login management & Start script

The name of this branch is kinda confusing. Instead of "deploy", it's more like startup and login.

Create a startup script for tyra.
gunicorn.conf.py is gunicorn config file for supervisord.
Remove the previous login management in the frontend and create a simple login management in the backend.
Create login page and logout button.
users.json is a json file that stores account email and password information for now. We might change to a small sql db in the future.

dssg / tyra