Tweak to PrestaShop import script

This project is for Masound2011 Here is summary of required tweak 1) update script to work with current stable version Prestashop v.1.5.4.1 2) multistore capable 3) case 1 to case 4 options to separate stock into different stores. see below for definition of multi store cases 4) confirm that weight, height, width, depth from xml are recorded to proper fields. Definition of Case 1-4 case 1 = product 1 only show in store 1 case 2 = product 2 only show in store 2 case 3 = product 3 will show in both store 1 and store 2. case 4 = All products will show in store 3 (warehouse)