EggListBox

[Alexander Larsson <alexl redhat com>]

I just created the egg-list-box repository on git.gnome.org which
contains the EggListBox widget and imported it (via git subtree) into
the gnome-contacts repository.

I then replaced the rather contrived use of TreeView in the contact
lists with this. It seems to work ok, but its not unlikely that there
will be regressions, so if anyone is running master, please try it out
and look for problems.