Added irc_RPL_ISUPPORT and irc_RPL_NAMREPLY methods.
the server, and irc_RPL_NAMREPLY for the out
...and it turns out I don't even need irc_RPL_ISUPPORT because that's
already implemented by IRCClient. Man, undocumented functionality is
awesome!
Now that I've figured out how to use self.supported, this should work
far better.