[uf-new] Receipt microformat

[Storset, Leif]

Hi Rob, all,

> If this doesn't create too many arguments I'd like to create a wiki 
> page where we can work to model the commerce related relationships 
> between the existing formats

This is a great idea. Making information easier to find makes
microformats that much easier to use.

> NOTE: One thing that seemed to be missing from Joe's proposal was 
> tax information.

Yes. We would also need to consider a permalink URL and quantities;
maybe an "appears on your statement as XYZCORP" field (for payment
middlemen).

Thanks for contributing!

-Leif