We move our menus.ui file into Gtk's namespace so that it will get
picked up. Accordingly, we no longer have to do any of the work for
ourselves...
https://bugzilla.gnome.org/show_bug.cgi?id=722092
Move bloatpad to ./examples/bp/ so that we can start treating it as more of a
"normal" app instead of just jamming everything into a single .c file.
We don't use the name "bloatpad" for the directory in order not to
create 'git pull' pain with the probably-already-existing executable of
the same name.
https://bugzilla.gnome.org/show_bug.cgi?id=722092
