Added functionalities to update shopping cart price

git-svn-id: http://svn.code.sf.net/p/shopizer/code/shopizer-portlet@2785 e80ee2c7-76f3-4005-aeaf-98396743f455
Added functionalities to update shopping cart price

git-svn-id: http://svn.code.sf.net/p/shopizer/code/shopizer-portlet@2786 e80ee2c7-76f3-4005-aeaf-98396743f455
Added feature to navigate to cart details page

git-svn-id: http://svn.code.sf.net/p/shopizer/code/shopizer-portlet@2787 e80ee2c7-76f3-4005-aeaf-98396743f455