Robustness Additions

Fixes some issues that would cause the bot to die, refactors things to be cleaner, and removes !vtlast officially. Not many user facing changes this time around.

API Integration

Big changes on the back-end side, and nothing to show for it on the user side this time around.

The database integration has been broken out into a separate API service, which this now interfaces with. See banned-word-server for details.

Configuration support

This is pretty huge, not only can users now customize the length of the timeout, but they can also customize the word they're banning.

Database support

Everything's been rewritten to stop storing all the state data in memory, and start using a sqlite database.