Markov -> Generator ✔️
Chatlog -> Metadata ✔️
Scribe -> Reader ✔️
Speaker updated ✔️
Also:
- Updated to python-telegram-bot v. 12 callbacks
- Renamed a lot of variables and rewritten a lot of code to follow Python conventions
- Added a new argument for filter chat IDs
- Changed obtention of username from hardcoded to a library-provided function
- Added a new argument for bot nicknames that it can respond to