message: Orchard give +1 food regardless of irrigation
diff: <Civilopedia>TXT_KEY_IMPROVEMENT_ORCHARD_PEDIA</Civilopedia>
  <ArtDefineTag>ART_DEF_IMPROVEMENT_ORCHARD</ArtDefineTag>
  <PrereqNatureYields/>
  - <IrrigatedYieldChange>
  - <iYield>1</iYield>
  - <iYield>0</iYield>
  - <iYield>0</iYield>
  - </IrrigatedYieldChange>
  + <YieldChanges>
  + <iYieldChange>1</iYieldChange>
  + <iYieldChange>0</iYieldChange>
  + <iYieldChange>0</iYieldChange>
  + </YieldChanges>
  <bActsAsCity>0</bActsAsCity>
  <bHillsMakesValid>0</bHillsMakesValid>
  <bFreshWaterMakesValid>0</bFreshWaterMakesValid>
  <bRequiresFlatlands>0</bRequiresFlatlands>
  <bRequiresRiverSide>0</bRequiresRiverSide>
  <bRequiresIrrigation>0</bRequiresIrrigation>
  - <bCarriesIrrigation>0</bCarriesIrrigation>
  + <bCarriesIrrigation>1</bCarriesIrrigation>
  <bRequiresFeature>0</bRequiresFeature>
  <bWater>0</bWater>
  <bGoody>0</bGoody>
  