Startup flags: can be started and configured without ever doing the interactive setup
Changed default settings format so that all unset values are None
Removed new cogs prompt
Removed `LOGIN_TYPE` from settings.json. It now defaults to token and fallbacks to email/password
Smarter initial setup: only asks for the settings that are actually missing
For the first installation all default cogs are loaded
Startup flag that allows settings to be memory-only
Initial selfbot support
Only reset login credentials (on confirmation) instead of deleting the whole file in case of login failure
Revamped main screen
Made sure that nothing blows up when you run Red on Windows without `chcp 65001`
Possibility of setting credentials in the environment variables `RED_TOKEN` / `RED_EMAIL` `RED_PASSWORD`. They will take priority over the configuration stored on disk.
Added `[p]set serverprefix`
`Bot.command_prefix` is now a callable that returns the prefixes set for the server. If none are set, it returns the global ones.
