terrible get-info hack
open a window with a messager in it

(for when you accidentally delete your messager)
replystr, followupstr -> reply, followup  (+ infrastructure)

some infrastructure to make them consistent across different
backend types.
multi-backend send; remove roost sending kludge
proper send support in irccloud
comment out some overly-chatty debugging
tweak roost message display
remove some intermediate-stage hacks