Merge pull request #46 from AndreyProkofyev/1.1

DADATA - added federal_district property

Author: Sergei Kasatkin

src/Response/Address.php

@@ -564,11 +564,17 @@ class Address extends AbstractResponse
      * @var string ISO-код страны
      */
     public $country_iso_code;
+
     /**
      * @var string  ISO-код региона
      */
     public $region_iso_code;
 
+    /**
+     * @var string Федеральный округ РФ
+     */
+    public $federal_district;
+
     public function __toString()
     {
         return (string)$this->result;