Log Message:
Update to 2.2.0.  Changes since 2.0.3.3:

* bonobo/bonobo-ui-toolbar.c (accumulate_item_size): split from
  (update_sizes): here and account for the popup's item's size itself if items
  moved there.
* bonobo/bonobo-ui-toolbar.c (show_popup_window): fix #76310, popup going off
  the side of the screen unhelpfully.
* configure.in: Added Amharic (am) and Dutch (nl) to ALL_LINGUAS
* configure.in: add a check for people with stale / non-parallel installable
  gdk-pixbuf's - it seems there are a number of such people.
* Fix Makefile.am's for libtool's non-understanding of -pthread.
* bonobo/bonobo-ui-util.c (bonobo_help_display_cb): re-hash so we can still
  allow components to register their own custom prefix intead of using the
  main program's always.
* bonobo/bonobo-ui-util.c (bonobo_help_display_cb): fix search datadir to use
  existing GnomeProgram if available.