Update regions

src/geoipregionvars.php

@@ -1,5 +1,5 @@
 <?php
-// Copyright 2014 MaxMind, Inc. All Rights Reserved
+// Copyright 2015 MaxMind, Inc. All Rights Reserved
 global $GEOIP_REGION_NAME;
 $GEOIP_REGION_NAME = array (
   'AD' => 
@@ -2113,6 +2113,7 @@
     17 => 'Stung Treng',
     18 => 'Svay Rieng',
     19 => 'Takeo',
+    23 => 'Ratanakiri',
     25 => 'Banteay Meanchey',
     28 => 'Preah Seihanu',
     30 => 'Pailin',
@@ -2514,7 +2515,7 @@
     35 => 'Gradsko',
     36 => 'Ilinden',
     37 => 'Izvor',
-    38 => 'Jegunovce',
+    'D5' => 'Jegunovce',
     39 => 'Kamenjane',
     40 => 'Karbinci',
     41 => 'Karpos',
@@ -3812,6 +3813,7 @@
     'P3' => 'Smarjesk Toplice',
     'P4' => 'Sredisce ob Dravi',
     'P5' => 'Straza',
+    'P7' => 'Sveti Jurij v Slovenskih Goricah',
   ),
   'SK' => 
   array (
@@ -4433,6 +4435,7 @@
     11 => 'Sirdaryo',
     12 => 'Surkhondaryo',
     14 => 'Toshkent',
+    15 => 'Jizzax',
   ),
   'VC' => 
   array (

src/timezone.php

@@ -4,7 +4,7 @@
  * Get time zone
  * @param string $country
  * @param string $region
- * @return string If the timezone is not found, returns NULL
+ * @return string If the timezone is not found, returns null`
  */
 function get_time_zone($country, $region)
 {