Added updating inventory labels and moneylabel in marketplace
to do: move player configuration to top of hierarchy
Label cocaineUnitPrice commented out, causes a nullpointer (other 4 work fine)
gold unit price shows as negative integer
Add cocaine unit price
Fix planet's resource price calculation formula.
Add total cost and total profit bindings.
added comments regarding setting slider maximums
Update money on buy / sell
Update resources on buy / sell.