Extend discounting of costs to OPEX
Extend discounting of costs to OPEX

After discussions with economics we have found it necessary to also dicount the operational costs. We therefore introduced a new function calc_operational_costs_annualized which discounts both the Operation and maintenance as well as operational costs from feedstock consumption.

architecture-building-systems/CityEnergyAnalyst,architecture-building-systems/CityEnergyAnalyst,architecture-building-systems/CityEnergyAnalyst