[Tracker] Automatic Language Detection

["Edward Duffy" <eduffy gmail com>]

Hi Guys -

I just wrote a patch for #377891[1], could I get some of you to test
it.  I ran some pdfs I found with google.fr and google.it, and it
seems to be working correctly...but more eyes the better.

Thanks.

[1] http://bugzilla.gnome.org/show_bug.cgi?id=377891