lib: Implement _search_async()
lib: Implement _search_async()

zeenix/geocode-glib,mlundblad/geocode-glib,zeenix/geocode-glib,Distrotech/geocode-glib,Distrotech/geocode-glib,mlundblad/geocode-glib,mlundblad/geocode-glib,zeenix/geocode-glib