[Zope] eMarket product

This is an alpha quality-version 'starter' of an EMarket Product. I have lots of work to do to 'process' purchases, but the basic idea is there.. and it shows one possible way to use Zope Folders as a super class for more or less generic folderish objects. I'm doing this as a way to learn about Zope, but also produce something that might be useful for me (and maybe serve as a beginning example to someone else!). Suggestions, patches, etc etc.. welcome. Good Luck! -steve