Flask app startup issue fix

[timworx]

This repo (and all your work) is much appreciated @llSourcell!

This PR contains some quick fixes and cleanup I ran into while getting started with running the flask app that were causing issues with running it.

• Remove reference to config.py file in Flask setup (since it is unused and not in the repo currently.). This fixes open issue #1
• Removed committed bytecode (.pyc files and pycache/ dirs). This was causing some issues as well.
• Setup .gitignore to ignore Python bytecode files, along with Jupyter notebook checkpoint files.
• Created __init__.py file in models/