Add some more query operations for Traversable<G>

* first_match (Predicate<G>) returns the first item that matches
* any_match (Predicate<G>) checks if any element matches
* all_match (Predicate<G>) checks if all elements match
* max/min returns max/min value
* order_by to perform ordering on any Traversable

https://bugzilla.gnome.org/show_bug.cgi?id=776558