[Typo3-shop] zk_products category <---> page

[Franz Holzinger]

Here is the text in the zk-documentation for this:

There are multiple ways to create a shop. The old way (in my opinion) is 
to create sysfolders for the products and list and single sites where 
there products are displayed. If you want to do a bigger shop with 
typo3, this will become a little bit unhandy.

Here is the way, I build the shop for our customers:
Forget the original Shop Categories. I only use them for manufacturer 
separation. What I call “categories” are pages. Create a page hirachy 
like this:

Create extended pages and choose “Shop” at contains plugin. This does 
technically nothing, but changes the icon in the blue shop symbol. Each 
page has only the “product list” content element without startingpoint.