This was caused by some early attempts at not replaying messages. That was
fixed by tracking messages explicitly but these early returns with no logging
were never removed.
Fixes#23
This commit also points to my fork of discordgo which makes it look like the
official client which is the only way to get the actually contents of a dm
when not authorized as a bot.
* The bot now properly joins the management room
* The management room is persisted in the database
* Welcome/help messages are sent in the management room
