Allow format_date smarty function date parameter to be well formatted datetime string
	modifié:         core/lib/Thelia/Core/Template/Smarty/Plugins/Format.php
Merge pull request #638 from lovenunu/formatdate

Allow format_date smarty function date parameter to be a well formatted datetime string
Merge pull request #634 from zzuutt/add-cart-attr-count_product

add cart attr count_product... fix #601
fix #533

fix error in form if pse.quantity = 0 and PSE_CHECK_AVAILABILITY = 0
$pse.quantity.val() is initialized to 0

and fix in category page
if PSE_CHECK_AVAILABILITY = 1 and stock = 0  display 'view product'
button