another "this is unnecessary" change, obviously impacting all the
modules that override __init__ as well as the base class. again, they
can use the DrBotIRC instance for anything, which is (with one
exception) only for add/remove_global_handler, which i'm planning on
working my way off of anyway
obviously this means all of the modules changed to accomodate. this is
one of many steps to reduce the number of times we pass connections and
servers and other such info around, when it's mostly unnecessary because
modules have a reference to DrBotIRC
