* Fix wrong parameter name to on_name_appeared callbacks
* optparse doesn't just leave extra command line arguments, it
errors out, so don't try to pass through extra arguments -
instead add explicit passthrough for '--replace'
* Fix usage of Gio.DBusProxy
* Add a default value for --perf so that if it's not supplied
things don't die with a mysterious error message. (This wasn't
needed when --perf enabled perf-mode)
https://bugzilla.gnome.org/show_bug.cgi?id=687287
Introduce a new gnome-shell-perf-tool, which can be used instead
of the old gnome-shell-jhbuild wrapper to gather data about gnome-shell
performance and submit to shell-perf.gnome.org. This runs the
shell with no extra setup beyond the WM_CLASS filter, so it can
be used for a jhbuild setup or for an installed shell.
