message: Increase Theatre cost
diff: <ArtDefineTag>ART_DEF_BUILDING_THEATRE</ArtDefineTag>
  <PrereqTech>TECH_LITERATURE</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  - <iCost>50</iCost>
  + <iCost>60</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iAsset>3</iAsset>
  <ArtDefineTag>ART_DEF_BUILDING_GREEK_ODEON</ArtDefineTag>
  <PrereqTech>TECH_LITERATURE</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  - <iCost>50</iCost>
  + <iCost>60</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iHappiness>1</iHappiness>
  <ArtDefineTag>ART_DEF_BUILDING_BYZANTINE_HIPPODROME</ArtDefineTag>
  <PrereqTech>TECH_LITERATURE</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  - <iCost>50</iCost>
  + <iCost>60</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iHappiness>1</iHappiness>
  <ArtDefineTag>ART_DEF_BUILDING_CHINESE_PAVILLION</ArtDefineTag>
  <PrereqTech>TECH_LITERATURE</PrereqTech>
  <bNeverCapture>1</bNeverCapture>
  - <iCost>50</iCost>
  + <iCost>60</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iMinAreaSize>-1</iMinAreaSize>
  <iAsset>4</iAsset>
  