Limit Scope of price recalculation

[Goosius1]

• Currently the price recalculation function starts after every regeneration, and recalculates ALL prices in the world
• This is going to overwrite any custom prices which a server has put on
• Solution: Limit the recalculation function only to affected provinces:
  • Some provinces were deleted, we can ignore those
  • Some provinces were added....yes we want to calculate those
  • Some existing provinces may have expanded...yes we want to do those
• To do this, we need, for every regeneration job, to keep a list of changed provinces e.g.
  • deletedProvinces
  • newProvinces
  • updatedProvinces

[Goosius1]

This work is less important now that the price limiter is in place