Added tasks: End Session, Close Gui.
Added /twitchplays command.
Reordered task registry so that op-only tasks are at the bottom
Added "disabled tasks" config.
Added TwitchPlays sessions, which has to be started by the player and ends when the player ends the session or quits to the main menu.
Added configs to listen to MC chat, auto connect to a twitch chat (if you have twitch chat disabled, it'll start a session anyways but won't connect, so that mc chat commands will work).