message: Central Planning: add double production for Hydro Plant, Electrical Grid, Automated Factory
diff: <BuildingType>BUILDINGCLASS_COAL_PLANT</BuildingType>
  <iProductionModifier>100</iProductionModifier>
  </BuildingProductionModifier>
  + <BuildingProductionModifier>
  + <BuildingType>BUILDINGCLASS_HYDRO_PLANT</BuildingType>
  + <iProductionModifier>100</iProductionModifier>
  + </BuildingProductionModifier>
  + <BuildingProductionModifier>
  + <BuildingType>BUILDINGCLASS_ELECTRICAL_GRID</BuildingType>
  + <iProductionModifier>100</iProductionModifier>
  + </BuildingProductionModifier>
  + <BuildingProductionModifier>
  + <BuildingType>BUILDINGCLASS_AUTOMATED_FACTORY</BuildingType>
  + <iProductionModifier>100</iProductionModifier>
  + </BuildingProductionModifier>
  </BuildingProductionModifiers>
  <ImprovementYieldChanges>
  <ImprovementYieldChange>
  