Support searching only pages in certain language

[PanderMusubi]

Please, support searching only pages in a certain language via url parameters "lr=lang_nl" for Dutch and "lr=lang_fr" for French, etc.

[PanderMusubi]

Workaround for results only in Dutch is:

        query_url = self.api_url_template % self._ajax_query
        query_url += '&lr=lang_nl' # only Dutch pages
        self._result_data = self.hit_the_search_api(query_url)

[PanderMusubi]

See also #1

[frrmack]

The Google API that googlesearch used is no longer available, and barring a complete overhaul it is now defunct. Keeping this issue open to address it in case of a rewrite, but right now the package is withdrawn from PyPI.