Add additional output for the current request

This is useful to have some progress indication for huge repositories.

bin/github-backup

@@ -431,6 +431,7 @@ def _construct_request(per_page, page, query_args, template, auth):
     request = Request(template + '?' + querystring)
     if auth is not None:
         request.add_header('Authorization', 'Basic '.encode('ascii') + auth)
+    log_info('Requesting {}?{}'.format(template, querystring))
     return request