message: Adjust build costs for cottages, workshops, watermills
diff: <Type>BUILD_WORKSHOP</Type>
  <Description>TXT_KEY_BUILD_WORKSHOP</Description>
  <PrereqTech>TECH_ARTISANRY</PrereqTech>
  - <iTime>600</iTime>
  + <iTime>800</iTime>
  <ImprovementType>IMPROVEMENT_WORKSHOP</ImprovementType>
  <EntityEvent>ENTITY_EVENT_MINE</EntityEvent>
  <FeatureStructs>
  <Type>BUILD_WATERMILL</Type>
  <Description>TXT_KEY_BUILD_WATERMILL</Description>
  <PrereqTech>TECH_MACHINERY</PrereqTech>
  - <iTime>600</iTime>
  + <iTime>800</iTime>
  <ImprovementType>IMPROVEMENT_WATERMILL</ImprovementType>
  <EntityEvent>ENTITY_EVENT_BUILD</EntityEvent>
  <FeatureStructs>
  <Type>BUILD_COTTAGE</Type>
  <Description>TXT_KEY_BUILD_COTTAGE</Description>
  <PrereqTech>TECH_PROPERTY</PrereqTech>
  - <iTime>800</iTime>
  + <iTime>600</iTime>
  <ImprovementType>IMPROVEMENT_COTTAGE</ImprovementType>
  <EntityEvent>ENTITY_EVENT_BUILD</EntityEvent>
  <FeatureStructs>
  <Type>BUILD_WORKSHOP_DEFORESTATION</Type>
  <Description>TXT_KEY_BUILD_WORKSHOP</Description>
  <PrereqTech>TECH_ARTISANRY</PrereqTech>
  - <iTime>600</iTime>
  + <iTime>800</iTime>
  <ImprovementType>IMPROVEMENT_WORKSHOP</ImprovementType>
  <EntityEvent>ENTITY_EVENT_MINE</EntityEvent>
  <FeatureStructs>
  <Type>BUILD_WATERMILL_DEFORESTATION</Type>
  <Description>TXT_KEY_BUILD_WATERMILL</Description>
  <PrereqTech>TECH_MACHINERY</PrereqTech>
  - <iTime>600</iTime>
  + <iTime>800</iTime>
  <ImprovementType>IMPROVEMENT_WATERMILL</ImprovementType>
  <EntityEvent>ENTITY_EVENT_BUILD</EntityEvent>
  <FeatureStructs>
  <Type>BUILD_COTTAGE_DEFORESTATION</Type>
  <Description>TXT_KEY_BUILD_COTTAGE</Description>
  <PrereqTech>TECH_PROPERTY</PrereqTech>
  - <iTime>800</iTime>
  + <iTime>600</iTime>
  <ImprovementType>IMPROVEMENT_COTTAGE</ImprovementType>
  <EntityEvent>ENTITY_EVENT_BUILD</EntityEvent>
  <FeatureStructs>
  