message: Reduce cost of Bourse and Crystal Palace
diff: <iGreatPeopleRateChange>2</iGreatPeopleRateChange>
  <bTeamShare>1</bTeamShare>
  <bNukeImmune>1</bNukeImmune>
  - <iCost>600</iCost>
  + <iCost>400</iCost>
  <iHurryCostModifier>200</iHurryCostModifier>
  <iAdvancedStartCost>-1</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iGreatPeopleRateChange>2</iGreatPeopleRateChange>
  <bTeamShare>1</bTeamShare>
  <bNukeImmune>1</bNukeImmune>
  - <iCost>1200</iCost>
  + <iCost>800</iCost>
  <iHurryCostModifier>200</iHurryCostModifier>
  <iAdvancedStartCost>-1</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  