URL rewriting: capable of fully working with urls without ?

URL rewriting: works with image file instead of image id (change
make_picture_url to generate urls with file name instead of image id)

URL rewriting: completely works with category/best_rated and
picture/best_rated/534 (change 'category.php?' to 'category' in make_index_url
and 'picture.php?' to 'picture' in make_picture_url to see it)

fix: picture category display in upper bar

fix: function rate_picture variables and use of the new user type

fix: caddie icon appears now on category page

fix: admin element_set sql query was using storage_category_id column
(column has moved to #image_categories)

fix: replaced some old $_GET[xxx] with $page[xxx]

fix: pictures have metadata url (use ? parameter - might change later)

git-svn-id: http://piwigo.org/svn/trunk@1092 68402e56-0260-453c-a942-63ccdbb3a9ee

include/calendar_base.class.php

@@ -261,8 +261,14 @@ SELECT DISTINCT('.$this->calendar_levels[$level]['sql']
       }
     }
 
+    $dates = $page['chronology_date'];
+    while ($level<count($dates))
+    {
+      array_pop($dates);
+    }
+
     $nav_bar = $this->get_nav_bar_from_items(
-      $page['chronology_date'],
+      $dates,
       $level_items,
       null,
       'calItem',