Merge branch 'development' of https://github.com/PrestaShop/PrestaShop into bootstrap

Conflicts:
	admin-dev/themes/default/css/modules.css
	admin-dev/themes/default/template/controllers/carts/helpers/view/view.tpl
	admin-dev/themes/default/template/controllers/groups/helpers/form/form.tpl
	admin-dev/themes/default/template/controllers/groups/helpers/view/view.tpl
	admin-dev/themes/default/template/controllers/products/helpers/form/form.tpl
	admin-dev/themes/default/template/controllers/products/images.tpl
	admin-dev/themes/default/template/controllers/products/prices.tpl
	admin-dev/themes/default/template/helpers/form/form.tpl
	admin-dev/themes/default/template/helpers/list/list_header.tpl
	classes/Autoload.php
	classes/Carrier.php
	classes/Product.php
	classes/ProductSale.php
	classes/Tools.php
	classes/Validate.php
	classes/tax/TaxRulesTaxManager.php
	controllers/admin/AdminPPreferencesController.php
	controllers/admin/AdminPerformanceController.php
	install-dev/install_version.php
	js/admin_carrier_wizard.js
	modules/blockcategories/blockcategories.php
	modules/blocklayered/blocklayered.php
	modules/statsequipment/statsequipment.php
	modules/statsproduct/statsproduct.php
	modules/watermark/watermark.php
	themes/default/address.tpl
	themes/default/authentication.tpl
	themes/default/category.tpl
	themes/default/contact-form.tpl
	themes/default/css/history.css
	themes/default/header.tpl
	themes/default/js/cart-summary.js
	themes/default/js/product.js
	themes/default/mobile/order-detail.tpl
	themes/default/modules/blocksearch/blocksearch.tpl
	themes/default/modules/productcomments/productcomments.tpl
	themes/default/order-carrier.tpl
	themes/default/order-detail.tpl
	themes/default/order-opc-new-account.tpl
	themes/default/product.tpl

install-dev/classes/languages.php

@@ -136,7 +136,10 @@ class InstallLanguages
 		}
 
 		$args[0] = $translation;
-		return call_user_func_array('sprintf', $args);
+		if(count($args) > 1)
+			return call_user_func_array('sprintf', $args);
+		else 
+			return $translation;
 	}
 
 	/**
@@ -210,4 +213,4 @@ function ps_usort_languages($a, $b)
     if ($aname == $bname)
         return 0;
     return ($aname < $bname) ? -1 : 1;
-}
+}