Dynamic Pricing based on Number of Owned Regions

[ZombiMigz]

Allow equations in region price config. Convert (ownedRegions) in the code to a variable based on the number of a region the player has. That way region pricing can be based on how many regions the player already owns. This could allow for players to create a second or third town at a higher price.

ex.
price: 1000+500*(ownedRegions)
instead of
price: 1000