GtkSearchEngine Tracker backend updates

[Martyn Russell <martyn lanedo com>]

Hi all,

I have created a branch with some updates to support the new 0.9 branch 
and also to return results sorted much more accurately.

Any problems with me committing this work:

  http://git.gnome.org/browse/gtk+/log/?h=tracker-0.8

It's the top 3 commits only.

--
Regards,
Martyn