FoxyCart Inventory 0.1.0

By The Man Can!
Adds simple inventory management for MODx sites using FoxyCart.com.

This functionality comes in two pieces:

* XML Parser: FoxyCart can be configured to send an encrypted XML file to a URL of your choice. The first snippet parses that XML and decreses inventory as necessary, based on configurable "product code" and "inventory" TVs.
* Add to Cart Link: A very simple snippet that checks a document's inventory TV value and outputs an "available" or "unavailable" chunk, based on inventory being >0 or no