(added) possibility to customize search output page layout by defining search page template (howto)
(fix) bug : after adding photoblog page, navigation tree was malfunctioning (and could damage pages in project)
(added) 2 new shop macros : %CATEGORY_VLIST% and %CATEGORY_HLIST% to display simple category list on page
can also be called on external page through link shop.php?category_vlist and shop.php?category_hlist