Updated representation descriptions. Preparing to add attributes to payment list on bill screen.
Merged from develop (conflict resolved in omod/src/main/webapp/resources/js/model/payment.js)
Added representation description to PaymentAttributeResource
Added pseudo properties to get the name for the attribute value (in case it's a Concept), and the attribute order
Sort payment attributes by the order defined by the attribute type
Add payment details to payment list view (added template for payment details)
Merge branch 'feature/paymentdetails' into develop

Conflicts:
	omod/src/main/webapp/resources/js/model/payment.js