note: i'm writing this after not working on this project for 6 months
so i'm kind of figuring this out for myself

anyway

pylon: a chat server that wilson makes a connection to
	which could be "some irc server", "some xmpp server"
	or "discord" (discord is centralized so there's only 1 discord to connect to)
		note that discord's concept of "server" aka "guild" is unrelated to anything

channel: a particular chatroom on a particular service
	eg "#a on apionet" or "#general in some discord guild"
	in the code, a channel is identified by a combination of a pylon, 
		and a string 'channel descriptor', whose format depends on the pylon type
	for instance xmpp channel descriptors are jids, discord uses numeric ids
	
bus: a family of connected channels that messages will be bridged between