Add api, ad login page, add models, views  

for postgres db in heroku:
 heroku addons:add heroku-postgresql:dev
 heroku pg:promote HEROKU_POSTGRESQL_COLOR
then run python in heroku:
 heroku run python

>>> from saulify import db
>>> db.create_all()

for add user:
>>> from saulify.models import User
>>> user = User(username='saul', email='saul@saulify.me')
>>> user.hash_password('saul')
>>> db.session.add(user)
>>> db.session.commit()

for login go to https://yourdomain/login

you can try here: https://mel-saulify.herokuapp.com/login
We can either place it here or abstract it into it's own class since we don't know how it will change over time. Also, we should probably place the Markdownification into it's own Markdownify class as well since some articles will be "cleaned" and displayed, and others will be cleaned and converted into Markdown