Done - Add per-star scaling for production cost, and food cost when building something.
Done - Experiment with linear or exponential progression to determine the best way to go.
In Progress - Change gui to show the cost, current resources, and projected time to make up the resources and finish the building at current production levels.
Done - Add income-based upkeep to all buildings.
Done - Add income-based upkeep to maximum number of ships
In Progress - Add a slider bar to show how much of total income you're willing to put into maintaining a fleet.
Done for the day.