message: Early worker art for all art styles
diff: <UnitMeshGroup>
  <EarlyArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_ASIAN</EarlyArtDefineTag>
  <MiddleArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_ASIAN</MiddleArtDefineTag>
  - <LateArtDefineTag>ART_DEF_UNIT_WORKER_MODERN</LateArtDefineTag>
  + <LateArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_ASIAN</LateArtDefineTag>
  </UnitMeshGroup>
  </StyleUnit>
  <StyleUnit>
  <UnitMeshGroup>
  <EarlyArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_EUROPEAN</EarlyArtDefineTag>
  <MiddleArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_EUROPEAN</MiddleArtDefineTag>
  - <LateArtDefineTag>ART_DEF_UNIT_WORKER_MODERN</LateArtDefineTag>
  + <LateArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_EUROPEAN</LateArtDefineTag>
  </UnitMeshGroup>
  </StyleUnit>
  <StyleUnit>
  <UnitMeshGroup>
  <EarlyArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_MIDDLE_EASTERN</EarlyArtDefineTag>
  <MiddleArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_MIDDLE_EASTERN</MiddleArtDefineTag>
  - <LateArtDefineTag>ART_DEF_UNIT_WORKER_MODERN</LateArtDefineTag>
  + <LateArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_EUROPEAN</LateArtDefineTag>
  </UnitMeshGroup>
  </StyleUnit>
  <StyleUnit>
  <UnitMeshGroup>
  <EarlyArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_SOUTH_AMERICAN</EarlyArtDefineTag>
  <MiddleArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_SOUTH_AMERICAN</MiddleArtDefineTag>
  - <LateArtDefineTag>ART_DEF_UNIT_WORKER_MODERN</LateArtDefineTag>
  + <LateArtDefineTag>ART_DEF_UNIT_WORKER_ANCIENT_EUROPEAN</LateArtDefineTag>
  </UnitMeshGroup>
  </StyleUnit>
  <StyleUnit>
  