Big request (partial rewrite)

[HEROgold]

Heyy, Noticed this project and wanted contribute! my changes help more easily to maintain as well as a little more type hinting, and DRY (Don't Repeat Yourself). I hope I was helpful!

This pull request has quite a list of changes, but they've NOT changed the behavior, or any commands. I've also removed the Database file to a sql file, it creates one if it cannot be found.

I tested the following:

• joining a vc
• leaving a vc
• deleting an empty vc

.voice:

• setup
• limit
• name
• lock
• unlock
• claim
• permit
• reject