message: 600 AD Vikings start with Guilds instead of Feudalism
diff: @@ -129,7 +129,7 @@ iCivChina : Techs([iMachinery, iAlchemy, iCivilService], column=6, exceptions=[i
  iCivKorea : Techs([iMachinery], column=6, exceptions=[iNobility]),
  iCivByzantium : Techs([iFortification,iMachinery, iCivilService], column=6),
  iCivJapan : Techs(column=6, exceptions=[iScholarship]),
  -iCivVikings : Techs([iFeudalism], column=6),
  +iCivVikings : Techs([iGuilds], column=6),
  },
  {
  iCivIndependent:Techs(column=10),
  