Population Traits Rebalance
Rebalance population traits such that the more expensive options give worse value on their output and the lower cost ones give a better value output.
The climate specific traits also then give a better output for cost than their generic equivalents.
May look into adding more traits such as [10]/[15] cost IDS traits in the future, but that will take a lot more time.
Not yet balanced in terms of boosting population, that still gives a bonus equal to the old values.
