September Updates

Latest revision 245 has a few fixes and features:

• Fix error when there are no taxes
• Add store param my_add_stock_zero. Will let the customer add items with zero stock to cart but it displays with (back-ordered) and quantity zero. Now you know they want it. Only for stores that check stock.
• Change routing so breadcrumb categories get proper link, when starting at a section (whew)
• Fix two  undeclared variables in checkout