[Collective-commerce] proposal small enhancment with currency handling

[Ognjen V. <og...@re...>]

The list of available currencies in PloneMallRegistry.Currency.py is declared 
in the actuall version (from cvs)  as a dictionary

I would propose that Currency.py tries to import them first like this:

try:
	from currency_config.py import VOC_CURRENCY
except:
	VOC_CURRENCY = {
		..
	}

Robert