Failure to run after install

[clach04]

setup.py requirements are too greedy and pull in version that are incompatible with current code:

AttributeError: module 'flask.json' has no attribute 'JSONEncoder'

ImportError: cannot import name 'url_quote' from 'werkzeug.urls' 

ImportError: cannot import name 'escape' from 'jinja2' 

ImportError: cannot import name 'json' from 'itsdangerous'

AttributeError: module 'sqlalchemy' has no attribute '__all__'. Did you mean: '__file__'?

SQLalchemy error is likely another manifestation of #6 (i.e. incompatible with SQLalchemy version 2.x).

[clach04]

Opened PR #9