Major Update by Kaleidosium

[Kaleidosium]

Thoughts? Please merge ASAP.

- Update Embed to look prettier
- Added (verbose) comments
- Some code restructuring
- Format the code with Black
- Use an `config.json` system to match TwitFix
- Added `wsgi.py` to match TwitFix
- Added WTFNONPL license file
- Update `README.md` to include a credit to me

P.S. I recommend to squash commits when merging.