message: Literature enables tech trade
diff: <iAsset>12</iAsset>
  <bTrade>1</bTrade>
  <bGoodyTech>1</bGoodyTech>
  - <bTechTrading>1</bTechTrading>
  <iGridX>3</iGridX>
  <iGridY>9</iGridY>
  <Flavors>
  <Era>ERA_CLASSICAL</Era>
  <iAsset>16</iAsset>
  <bTrade>1</bTrade>
  + <bTechTrading>1</bTechTrading>
  <bGoodyTech>0</bGoodyTech>
  <iGridX>4</iGridX>
  <iGridY>9</iGridY>
  