Added option to disable public list of payments.

I think this should be an option so that companies don't need to erase a chunk out of the template (perhaps they want to just use the stock files, or maybe they don't know to edit the file) when they don't want emails available for crawlers to see.

I can see why you might prefer it as a template-only thing though, feel free to decline if you disagree with the bit of overhead/complexity that this might add.