- fix use $page['nb_image_page'] instead of $user... when creating the nav bar (same as category_default)
- rewrote function format_date without regular expressions (faster); parameter date type is not used anymore (but I left it there for now)
git-svn-id: http://piwigo.org/svn/branches/2.0@3118 68402e56-0260-453c-a942-63ccdbb3a9ee